EP4244532A1 - Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer - Google Patents
Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerferInfo
- Publication number
- EP4244532A1 EP4244532A1 EP21794373.7A EP21794373A EP4244532A1 EP 4244532 A1 EP4244532 A1 EP 4244532A1 EP 21794373 A EP21794373 A EP 21794373A EP 4244532 A1 EP4244532 A1 EP 4244532A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- lighting device
- coupling
- elements
- light guide
- 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
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
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/24—Light guides
-
- 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
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
- F21S43/236—Light guides characterised by the shape of the light guide
- F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
-
- 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
- F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
-
- 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
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
- F21S43/242—Light guides characterised by the emission area
- F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
-
- 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
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
-
- 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
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/2605—Refractors
Definitions
- the invention relates to a lighting device for a motor vehicle headlight, comprising a first light guide which is set up to guide light from a light source and to emit it along a first direction; a second light guide configured to guide light from a light source and emit it along a second direction; an optical device which is set up to emit light from the first and second light guide as an optical light function into a traffic area, the optical device having a first light input surface, a first light output surface assigned to the first light input surface, a second light input surface and a second light input surface assigned to the second light input surface Has light output surface.
- the invention also relates to a motor vehicle headlight, comprising a lighting device.
- Lighting devices for motor vehicle headlights are known in the prior art, with two light guides supplying light to an optical device for generating a light function. If the light is to be emitted from the optical device in at least two directions, there is usually a diffuse emission through the light output surfaces of the optical device. However, this leads to a low light intensity and insufficient light emission in at least one of the two directions.
- the object of the present invention is to alleviate or eliminate the disadvantages of the prior art.
- the invention therefore aims in particular to create a lighting device with which the emission of light is improved. This object is achieved by a lighting device having the features of claim 1. Preferred embodiments are given in the dependent claims.
- the first light guide is arranged relative to the first light coupling surface in such a way that the light from the first light guide can be coupled into the optical device via the first light coupling surface, with the light coupled in through the first light guide passing through the optical device and being able to be coupled out via the first light coupling surface
- the second light guide is arranged relative to the second light coupling surface in such a way that the light of the second light guide can be coupled into the optical device via the second light coupling surface, wherein the light coupled in through the second light guide passes through the optical device and can be coupled out via the second light coupling surface
- the first light output surface is formed from a plurality of first surface elements and the second light output surface is formed from a plurality of second surface elements, the first and second surface elements being altered in such a way are arranged mutually in such a way that they essentially form a stepped structure, with a first surface element and a subsequent second surface element each forming a step, with the first surface element and the subsequent second surface element
- the first direction which corresponds in particular to the light emission direction of the first light guide, is preferably parallel to a longitudinal direction of a vehicle in which the lighting device can be installed.
- the second direction which corresponds in particular to the light emission direction of the second light guide, is preferably orthogonal to a longitudinal direction of a vehicle in which the lighting device can be installed.
- the first and second light decoupling surfaces together form a coherent, in particular closed, total decoupling surface which for example follows an imaginary curved plane.
- Light is guided within the light guide, preferably by means of total internal reflection at the boundary surfaces of the light guide.
- Deflection elements are preferably arranged within the light guide at decoupling points, which are set up to deflect light in such a way that the light is decoupled from the light guide.
- the light guide is designed, for example, as a rod-shaped light guide with an exit side and decoupling elements located opposite the exit side.
- the curved path or trajectory is a conceptual construct and can have a starting area and an ending area, wherein the starting area of the trajectory can comprise a notional surface which can be oriented substantially orthogonally to the first direction and parallel to the second direction.
- the end portion of the trajectory may include a notional surface that may be oriented substantially parallel to the first direction and orthogonal to the second direction.
- the optical device can run along the curved path.
- first light coupling-in surface is oriented essentially parallel to the first light coupling-out surface and the second light coupling-in surface is oriented essentially parallel to the second light coupling-out surface.
- first and second surface elements are essentially rectangular, preferably square.
- the edge length of a first and/or second surface element can be 0.5 mm to 10 mm, preferably 1 mm to 5 mm.
- the dimensions, in particular the length and width, of the first and second surface elements are preferably the same.
- the first and second surface elements are preferably set up to scatter or diffusely emit the light during decoupling. A homogeneous light emission can thus be achieved.
- the first and two surface elements are designed to leave the light beams essentially unchanged in their orientation during decoupling.
- the angle at which the light can be coupled in via the first and second light coupling surface can be determined in particular by the position of the first or second light guide relative to the first or second light coupling surface.
- surface vectors of the first surface elements and surface vectors of the second surface elements lie in one and the same plane.
- the area vector of the first area element is arranged in particular in the center point of the first area element.
- the area vector of the second area element is arranged in particular in the center point of the second area element.
- first and second surface elements to adjoin one another in alternation.
- the first and second planar elements preferably contact one another at an edge or at an edge of the respective planar element, whereby a closed, stepped arrangement of first and second planar elements can thereby be realized.
- a row of steps is formed in particular from a plurality of first and second surface elements, first and second surface elements preferably being arranged alternately in a row of steps.
- a first row of steps is preferably arranged vertically above or below a second row of steps.
- a row of steps can have a longitudinal direction along which the first and second planar elements are lined up, with a second row of steps being offset from the first row of steps in a direction that runs transversely to the longitudinal direction.
- the third direction is in particular orthogonal to a plane which is spanned by a directional vector of the first direction and a directional vector of the second direction.
- the at least two, preferably several, rows of steps along the first and/or second direction by a first and/or second Surface element are arranged offset from one another in such a way that the first and second surface elements form a cube structure in the at least two rows of steps.
- a first row of steps can be offset in particular vertically and horizontally relative to a second row of steps, with the horizontal and vertical offset preferably having a distance which corresponds to a length or a width of a first or second surface element.
- the light exit surface can essentially be formed from a large number of cube elements, with the individual cubes being arranged in a uniform grid, in particular in the form of a matrix, with respect to one another.
- the light emission direction of the first light guide is preferably orthogonal to the first surface elements. This results in the advantage that undesired light scattering at the interface transition is minimized.
- the second direction can be oriented orthogonally to the second surface elements.
- the light emission direction of the second light guide is preferably orthogonal to the second surface elements. This results in the advantage that undesired light scattering at the interface transition is minimized.
- a motor vehicle headlight comprising the lighting device.
- top, bottom, horizontal, vertical are to be understood as indications of the orientation when the lighting device is in normal Use position is arranged after it has been installed in a motor vehicle headlight.
- FIG. 1 shows a detailed view of a lighting device according to the invention
- FIG. 2 shows a further detailed view of the lighting device according to FIG. 1;
- FIG 3 shows a detailed view of a first and second calibration decoupling surface of the lighting device.
- FIG. 1 and 2 show detailed views of a lighting device 1 according to the invention, comprising a first light guide 2, which is designed to guide light from a light source (not shown) and to emit it along a first direction (x), and a second light guide 3, which is set up to guide light from a light source (not shown) and to radiate it along a second direction (y).
- a first light guide 2 which is designed to guide light from a light source (not shown) and to emit it along a first direction (x)
- a second light guide 3 which is set up to guide light from a light source (not shown) and to radiate it along a second direction (y).
- An optical device 4 is set up to emit light from the first 2 and second light guide 3 as an optical light function into a traffic area.
- the optical device 4 has a first light input surface 5a, a first light output surface 5b assigned to the first light input surface 5a, a second light input surface 6a and a second light output surface 6b assigned to the second light input surface 6a.
- the first light guide 2 is arranged relative to the first light coupling surface 5a in such a way that the light from the first light guide 2 can be coupled into the optical device 4 via the first light coupling surface 5a, with the light coupled in through the first light guide 2 passing through the optical device 4 and via the first light decoupling surface 5b can be decoupled.
- the second light guide 3 is arranged relative to the second light coupling surface 5a in such a way that the light from the second light guide 3 can be coupled into the optical device 4 via the second light coupling surface 6a, with the light coupled in through the second light guide 3 passing through the optical device 4 and via the second light decoupling surface 6b can be decoupled.
- the first light coupling-in surface 5a is oriented essentially parallel to the first light coupling-out surface 5b and the second light coupling-in surface 6a is oriented essentially parallel to the second light coupling-out surface 6b.
- the first light decoupling surface 5b is formed from a large number of first surface elements 7 and the second light decoupling surface 6b is formed from a large number of second surface elements 8.
- the first 7 and second surface elements 8 are arranged alternately to one another in such a way that they essentially form a stepped structure.
- a first surface element 7 forms a step with a subsequent second surface element 8, with a first surface element 7 and a subsequent second surface element 8 enclosing an angle of 45° to 135°, preferably essentially 90°.
- the first 7 and second surface elements 8 are essentially rectangular, preferably square. In particular, first 7 and second surface elements 8 alternately adjoin one another.
- the stepped structure or the total light decoupling surface which is formed from the first 5b and second light decoupling surface 6b, can follow a curved path (see FIG. 2).
- Surface vectors of the first surface elements 7 and surface vectors of the second surface elements 8 are preferably in one and the same plane.
- the first 5b and second light decoupling surface 6b has at least two, preferably several, rows of steps, each of which is formed from first 7 and second surface elements 8 arranged in steps relative to one another.
- the embodiment shown in FIG. 3 has six rows of steps.
- the at least two, preferably several rows of steps are arranged one above the other along a third direction, which is oriented orthogonally to the first and second direction.
- the third direction is essentially vertical. Two rows of steps arranged one above the other directly adjoin one another in the third direction.
- the at least two, preferably several, rows of steps are offset from one another along the first and/or second direction by a first 7 or second surface element 8 in such a way that the first and second surface elements in the at least two rows of steps form a cube structure.
- the first direction (x) is in particular oriented orthogonally to the first surface elements 7 .
- the second direction (y) is in particular oriented orthogonally to the second surface elements 8 .
- the first direction (x) is in particular oriented orthogonally to the first light coupling surface 5a.
- the second direction (y) is in particular oriented orthogonally to the second light coupling surface 6a.
- the first direction may be oriented parallel to the longitudinal direction of the motor vehicle in a state in which the lighting device 1 is installed in a motor vehicle.
- the first direction can thus correspond to the light emission direction of light which is emitted by a motor vehicle headlight installed in the motor vehicle.
- the second direction can be oriented orthogonally to the longitudinal direction of the motor vehicle.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20207143.7A EP4001744A1 (de) | 2020-11-12 | 2020-11-12 | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
| PCT/EP2021/078769 WO2022100964A1 (de) | 2020-11-12 | 2021-10-18 | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4244532A1 true EP4244532A1 (de) | 2023-09-20 |
| EP4244532B1 EP4244532B1 (de) | 2024-05-29 |
Family
ID=73401360
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20207143.7A Withdrawn EP4001744A1 (de) | 2020-11-12 | 2020-11-12 | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
| EP21794373.7A Active EP4244532B1 (de) | 2020-11-12 | 2021-10-18 | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20207143.7A Withdrawn EP4001744A1 (de) | 2020-11-12 | 2020-11-12 | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US11913618B2 (de) |
| EP (2) | EP4001744A1 (de) |
| JP (1) | JP7577854B2 (de) |
| KR (1) | KR102840191B1 (de) |
| CN (1) | CN116472425A (de) |
| WO (1) | WO2022100964A1 (de) |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005019018A1 (de) * | 2005-04-23 | 2006-10-26 | Volkswagen Ag | Leuchte mit wenigstens einem Lichtleiter und mehreren Lichtquellen |
| DE102011079790B4 (de) * | 2011-07-26 | 2018-08-02 | Automotive Lighting Reutlingen Gmbh | Stufenförmiger Lichtleiter und Lichtleiteranordnung |
| DE102012221389B4 (de) * | 2012-11-22 | 2019-08-22 | Automotive Lighting Reutlingen Gmbh | Kraftfahrzeugleuchte mit einem Lichtleiter und einer durch den Lichtleiter hindurch sichtbaren Blende |
| FR3008774B1 (fr) * | 2013-07-22 | 2018-01-12 | Renault S.A.S | Systeme d'eclairage, notamment pour un organe d'eclairage de vehicule automobile, a carte a circuit imprime dans le plan de la direction d'eclairage |
| DE102013222794A1 (de) * | 2013-11-08 | 2015-05-13 | Automotive Lighting Reutlingen Gmbh | Lichtleiter, Lichtleiterstruktur und Kfz-Beleuchtungseinrichtung |
| DE102013226133A1 (de) * | 2013-12-16 | 2015-06-18 | Automotive Lighting Reutlingen Gmbh | Kraftfahrzeugleuchte mit einem Lichtleiter |
| AT515470A1 (de) * | 2014-03-04 | 2015-09-15 | Zizala Lichtsysteme Gmbh | Lichtkopplungsschutz zwischen Lichtfunktionen |
| JP2015215946A (ja) | 2014-05-07 | 2015-12-03 | 市光工業株式会社 | 車両用灯具 |
| AT517105B1 (de) * | 2015-06-29 | 2016-11-15 | Zkw Group Gmbh | Lichtleiteranordnung zur Erzeugung von zumindest einer Beleuchtungsfunktion und/oder Signalisierungsfunktion eines Kraftfahrzeugscheinwerfers |
| CN105135316B (zh) * | 2015-08-25 | 2018-06-29 | 马瑞利汽车零部件(芜湖)有限公司 | 一种复合光学系统的汽车尾灯 |
| AT518551B1 (de) * | 2016-08-04 | 2017-11-15 | Zkw Group Gmbh | Kraftfahrzeugbeleuchtungsvorrichtung |
| AT519055B1 (de) * | 2016-09-08 | 2018-06-15 | Zkw Group Gmbh | Fahrzeugscheinwerfer |
| KR101987295B1 (ko) * | 2017-12-28 | 2019-06-11 | 에스엘 주식회사 | 차량용 램프 |
| DE102018125438A1 (de) | 2018-10-15 | 2020-04-16 | HELLA GmbH & Co. KGaA | Beleuchtungsvorrichtung für Fahrzeuge |
| DE102018125433A1 (de) * | 2018-10-15 | 2020-04-16 | HELLA GmbH & Co. KGaA | Beleuchtungsvorrichtung für Fahrzeuge |
| JP7345494B2 (ja) * | 2018-10-16 | 2023-09-15 | 株式会社小糸製作所 | 車両用装置 |
| US10895361B1 (en) * | 2019-08-22 | 2021-01-19 | Valeo North America, Inc. | Optical device for an automobile vehicle |
| CN210771921U (zh) * | 2019-10-14 | 2020-06-16 | 法雷奥市光(中国)车灯有限公司 | 光学组件和车灯 |
-
2020
- 2020-11-12 EP EP20207143.7A patent/EP4001744A1/de not_active Withdrawn
-
2021
- 2021-10-18 KR KR1020237010374A patent/KR102840191B1/ko active Active
- 2021-10-18 CN CN202180076215.XA patent/CN116472425A/zh active Pending
- 2021-10-18 US US18/034,978 patent/US11913618B2/en active Active
- 2021-10-18 EP EP21794373.7A patent/EP4244532B1/de active Active
- 2021-10-18 WO PCT/EP2021/078769 patent/WO2022100964A1/de not_active Ceased
- 2021-10-18 JP JP2023526271A patent/JP7577854B2/ja active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP7577854B2 (ja) | 2024-11-05 |
| US11913618B2 (en) | 2024-02-27 |
| EP4244532B1 (de) | 2024-05-29 |
| KR20230058128A (ko) | 2023-05-02 |
| US20240019093A1 (en) | 2024-01-18 |
| CN116472425A (zh) | 2023-07-21 |
| WO2022100964A1 (de) | 2022-05-19 |
| EP4001744A1 (de) | 2022-05-25 |
| JP2023547924A (ja) | 2023-11-14 |
| KR102840191B1 (ko) | 2025-07-31 |
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