EP4217647A1 - Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer - Google Patents
Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerferInfo
- Publication number
- EP4217647A1 EP4217647A1 EP21746766.1A EP21746766A EP4217647A1 EP 4217647 A1 EP4217647 A1 EP 4217647A1 EP 21746766 A EP21746766 A EP 21746766A EP 4217647 A1 EP4217647 A1 EP 4217647A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- distance
- lighting device
- free
- projection lens
- 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
- F21S41/25—Projection lenses
-
- 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
- F21S41/275—Lens surfaces, e.g. coatings or surface structures
-
- 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
- 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
- F21S41/322—Optical layout thereof the reflector using total internal reflection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
-
- 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
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
- F21W2102/10—Arrangement or contour of the emitted light
- F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
- F21W2102/18—Arrangement or contour of the emitted light for regions other than high beam or low beam for overhead signs
Definitions
- the invention relates to a lighting device for a motor vehicle headlight, which lighting device comprises the following:
- At least one light module for generating a low beam distribution with at least one light source, which is set up to emit light
- the light module being arranged in the installation position of the lighting device in a motor vehicle headlight on an upper side of the beam screen and in combination with the optically relevant screen edge of the beam screen to generate a low beam distribution
- a projection lens with an optical axis which projection lens is set up to image the light that can be generated by the light module in front of the lighting device in a main emission direction, the projection lens having a light entry surface and a convex light exit surface opposite the light entry surface.
- the invention also relates to a motor vehicle headlight with at least one lighting device according to the invention.
- This area of light distribution above the light-dark boundary is also referred to as the overhead or signlight area (derived from the visibility of the traffic signs).
- the statutory measuring points in this area extend up to 4° above the horizon and are characterized by minimum and maximum values as well as so-called cumulative values for the illuminance that occurs at the measuring points.
- the optical device is generally a modification of the "original" lens entry or light exit surface of the projection lens, with the most varied modifications being generally possible for deflecting light into a region above the light-dark boundary.
- a fundamental problem that occurs with all known solutions with such optical devices is that the deflected beams are concentrated in a relatively small area, so that on the one hand too much light gets into this area and on the other hand other areas have too low light values, ie that this area is not homogeneously illuminated by the known solutions.
- the projection lens comprises an optical device arranged on the projection lens, which comprises a multiplicity of free-form lenses, each with an effective surface, the optical device being set up to capture part of the light entering the projection lens and exiting via the effective surfaces of the free-form lenses Directing light to an area above the asymmetrical light-dark boundary of the low beam distribution.
- the targeted selection of the active surfaces and their course on the projection lens enables the widest possible and most homogeneously illuminated signlight in the low beam distribution.
- the optical device is arranged on the light exit surface of the projection lens and forms a manipulated part of the light exit surface that deviates from the convex light exit surface.
- the effective surface of each free-form lens and the light exit surface form a starting edge in a common surface intersection line, with the effective surface extending away from the starting edge of the light exit surface along two side edges to a sloped edge opposite the starting edge, preferably in the direction the main emission direction, which sloped edge has a first end and a second end, the first end being at a first distance from the light exit surface along a surface normal in an orthogonal projection onto the light exit surface, and the second end having a second distance along a surface normal in an orthogonal projection onto the light exit surface Has distance to the light exit surface.
- the optical device is arranged on the light entry surface of the projection lens and forms a manipulated part of the light entry surface that deviates from the light entry surface.
- first and the second distance of an effective surface is of the same size, wherein preferably the first and the second distance of each effective surface is of the same size.
- This object is also achieved by a motor vehicle headlight with at least one lighting device according to the invention.
- FIG. 1 shows an exemplary lighting device in a side view, with the lighting device comprising a light module, with the light from the light module being able to be projected in front of the lighting device via a beam shield by means of a projection lens,
- FIG. 2 shows a front view of the projection lens from FIG. 1, the projection lens comprising an optical device which has a plurality of free-form lenses,
- FIG. 3 shows a perspective view of the optical device from FIG. 3,
- 4A shows an exemplary free-form lens in a perspective view
- 4B another exemplary free-form lens in a perspective view
- Fig. 5 is a top sectional view of the projection lens and the optical device.
- FIG. 1 shows an exemplary lighting device 10 for a motor vehicle headlight, which lighting device comprises a light module 11 for generating a low-beam light distribution with at least one light source.
- the lighting device 10 comprises a beam stop 20 with an optically relevant stop edge for generating an asymmetrical light-dark boundary, the light module 11 being arranged in the installation position of the lighting device 10 in a motor vehicle headlight on an upper side of the beam stop 20 and in combination with the optically relevant Aperture edge of the beam diaphragm 20 contributes to the generation of a low beam distribution.
- the lighting device also includes a projection lens 100 with an optical axis B, which projection lens 100 is set up to project the light that can be generated by the light module in front of the lighting device 10 in a main emission direction, with the projection lens 100 having a light entry surface 110 and a convex light exit surface opposite the light entry surface 110 120 has.
- An optical device 200 is arranged on the light exit surface 120 of the projection lens 100, wherein the optical device 200 forms a manipulated part of the light exit surface that deviates from the convex light exit surface 120 and comprises a multiplicity of free-form lenses 210, each with an effective surface 211, such as in FIG 2 and 3, the optical device 200 being set up to direct part of the light entering the projection lens 100 and exiting via the active surfaces 211 of the free-form lenses towards an area above the asymmetrical cut-off line of the low-beam light distribution to steer.
- Figures 4A to 4C show exemplary embodiments of the free-form lenses 210, the effective surface 211 each having a free-form lens 210 and the light exit surface 120 in one common surface intersection line form a starting edge 211a, with the effective surface 211 extending from the starting edge 211a away from the light exit surface 120 along two side edges to a sloped edge 211b opposite the starting edge 211a, preferably in the direction of the main emission direction, which sloped edge 211b has a first end 212a and a second end 212b, wherein the first end 212a has a first distance A1 from the light exit surface 120 along a surface normal in an orthogonal projection onto the light exit surface 120, and the second end 212b has a second distance along a surface normal in an orthogonal projection onto the light exit surface 120 A2 to the light exit surface 120 has.
- the active surfaces are curved here, preferably formed under differently curved.
- the first distance A1 is greater than the second distance A2, with the second distance A2 being zero.
- the first distance A1 is greater than the second distance A2.
- the first distance A1 is equal to the second distance A2.
- the free-form lenses 210 of the optical device 200 are arranged next to one another in a horizontal row when the lighting device 10 is installed in a motor vehicle headlight, with the first distance A1 of the effective surfaces 211 starting from a first free-form lens of the horizontally arranged free-form lenses extending to to a last free-form lens is initially smaller than the second distance A2, with the first distance A1 increasing over the course of the optical axis B and the second distance A2 decreasing, so that the first distance A1 of the free-form lenses in the area of the optical axis B is equal to the second distance A2 with the first distance A1 continuing to increase further away from the optical axis B and the second distance A2 continuing to decrease, as outlined in FIG.
- the optical device 200 may be arranged in another example on the light entry surface 110 of the projection lens 100, with the free-form lenses 210 being arranged next to one another in a plurality of rows parallel to one another.
- the effective surface 211 of a free-form lens 210 - similar to the example shown in the figures - and the light entry surface 110 form a starting edge in a common surface intersection line, with the effective surface 211 starting from the starting edge 211a extending from the light entry surface 110 along two side edges to a sloped edge 211b opposite the starting edge 211a, which sloped edge 211b has a first end and a second end, the first end being a first distance A1 from the light entrance surface 120 along a surface normal in an orthogonal projection onto the light entry surface 110, and the second end 212b has a second distance A2 from the light exit surface 120 along a surface normal in an orthogonal projection onto the light entry surface 120.
- the first and the second distance A1, A2 of an active surface 211 is the same, the first and the second distance A1, A2 of each active surface 211 preferably being the same.
- the free-form lenses 210 of the optical device 200 are arranged relative to one another such that a logo, for example a manufacturer's logo, is formed.
Landscapes
- 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
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20198338.4A EP3974709A1 (de) | 2020-09-25 | 2020-09-25 | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
| PCT/EP2021/070886 WO2022063461A1 (de) | 2020-09-25 | 2021-07-26 | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4217647A1 true EP4217647A1 (de) | 2023-08-02 |
| EP4217647B1 EP4217647B1 (de) | 2024-09-04 |
Family
ID=72659139
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20198338.4A Withdrawn EP3974709A1 (de) | 2020-09-25 | 2020-09-25 | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
| EP21746766.1A Active EP4217647B1 (de) | 2020-09-25 | 2021-07-26 | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20198338.4A Withdrawn EP3974709A1 (de) | 2020-09-25 | 2020-09-25 | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12398856B2 (de) |
| EP (2) | EP3974709A1 (de) |
| JP (1) | JP7520219B2 (de) |
| KR (1) | KR102801914B1 (de) |
| CN (1) | CN116194709B (de) |
| WO (1) | WO2022063461A1 (de) |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2770617B1 (fr) * | 1997-10-30 | 2000-02-04 | Valeo Vision | Projecteur elliptique pour vehicule automobile dont le faisceau lumineux presente une coupure attenuee |
| JP3886672B2 (ja) * | 1999-07-12 | 2007-02-28 | 株式会社小糸製作所 | 車両用前照灯 |
| DE102004011104A1 (de) * | 2004-03-07 | 2005-09-29 | Docter Optics Gmbh | Scheinwerferlinse für einen Kraftfahrzeugscheinwerfer |
| AT8253U1 (de) * | 2005-03-14 | 2006-04-15 | Zizala Lichtsysteme Gmbh | Linse für einen fahrzeugscheinwerfer |
| DE102009020593B4 (de) * | 2009-05-09 | 2017-08-17 | Automotive Lighting Reutlingen Gmbh | Zur Erzeugung einer definierten Overhead-Beleuchtung eingerichteter Fahrzeugscheinwerfer |
| KR101248776B1 (ko) * | 2011-02-10 | 2013-04-24 | 주식회사 세코닉스 | 전조등용 프로젝션 렌즈 및 이를 구비한 차량용 전조등 유닛 |
| DE102011114636A1 (de) * | 2011-10-04 | 2013-04-04 | Automotive Lighting Reutlingen Gmbh | Anordnung und Dimensionierung von Overhead-Elementen auf einer Projektionslinse eines Kraftfahrzeugscheinwerfers |
| DE102012107427A1 (de) * | 2012-08-14 | 2014-05-22 | Hella Kgaa Hueck & Co. | Optische Fläche und Beleuchtungsvorrichtung für Fahrzeuge |
| DE102012107426A1 (de) * | 2012-08-14 | 2014-02-20 | Hella Kgaa Hueck & Co. | Scheinwerfer für Fahrzeuge |
| CN105121946B (zh) | 2013-04-02 | 2018-03-02 | 市光工业株式会社 | 车辆用灯具 |
| WO2014208655A1 (ja) * | 2013-06-26 | 2014-12-31 | 市光工業株式会社 | 車両用灯具 |
| DE102014118745B4 (de) | 2014-12-16 | 2022-03-17 | HELLA GmbH & Co. KGaA | Scheinwerfer für Fahrzeuge |
| EP3091273B1 (de) * | 2015-05-04 | 2020-11-11 | ZKW Group GmbH | Optische struktur für signlight |
| JP6705192B2 (ja) * | 2016-02-04 | 2020-06-03 | 市光工業株式会社 | 車両用灯具 |
| DE102017105027A1 (de) * | 2017-03-09 | 2018-09-13 | Automotive Lighting Reutlingen Gmbh | Kraftfahrzeugscheinwerferlichtmodul |
| EP3616994A1 (de) * | 2018-08-31 | 2020-03-04 | ZKW Group GmbH | Kraftfahrzeugscheinwerfer mit diffraktiven optischen elementen |
-
2020
- 2020-09-25 EP EP20198338.4A patent/EP3974709A1/de not_active Withdrawn
-
2021
- 2021-07-26 EP EP21746766.1A patent/EP4217647B1/de active Active
- 2021-07-26 CN CN202180065687.5A patent/CN116194709B/zh active Active
- 2021-07-26 KR KR1020237004427A patent/KR102801914B1/ko active Active
- 2021-07-26 JP JP2023517365A patent/JP7520219B2/ja active Active
- 2021-07-26 WO PCT/EP2021/070886 patent/WO2022063461A1/de not_active Ceased
- 2021-07-26 US US18/025,079 patent/US12398856B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US12398856B2 (en) | 2025-08-26 |
| KR102801914B1 (ko) | 2025-04-30 |
| EP4217647B1 (de) | 2024-09-04 |
| CN116194709B (zh) | 2025-11-18 |
| EP3974709A1 (de) | 2022-03-30 |
| CN116194709A (zh) | 2023-05-30 |
| WO2022063461A1 (de) | 2022-03-31 |
| JP7520219B2 (ja) | 2024-07-22 |
| KR20230036130A (ko) | 2023-03-14 |
| JP2023542150A (ja) | 2023-10-05 |
| US20250075871A1 (en) | 2025-03-06 |
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