EP4217646A1 - Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer - Google Patents
Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerferInfo
- Publication number
- EP4217646A1 EP4217646A1 EP21743214.5A EP21743214A EP4217646A1 EP 4217646 A1 EP4217646 A1 EP 4217646A1 EP 21743214 A EP21743214 A EP 21743214A EP 4217646 A1 EP4217646 A1 EP 4217646A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lighting device
- light
- light module
- stop
- fresnel 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
- F21S41/40—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
- F21S41/10—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
- F21S41/20—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
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
- F21S41/265—Composite lenses; Lenses with a patch-like shape
-
- 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
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
- F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
-
- 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
- F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
- F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
- F21W2102/16—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions having blurred cut-off lines
Definitions
- the invention relates to a lighting device for a motor vehicle headlight, which lighting device comprises the following:
- At least one first light module with at least one light source for generating a light distribution in the direction of a main emission direction, the light module being set up to emit light beams in a main emission direction,
- the projection lens being designed as a Fresnel lens, which Fresnel lens comprises a base body and a plurality of annular steps arranged on the base body, which steps in the are arranged substantially concentrically to one another, each step having a main surface for projecting the light beams of the at least one light module in front of the lighting device and a sloped surface extending from the base body to the main surface,
- the beam stop comprises an optically relevant stop edge for generating a light-dark boundary, wherein the stop edge intersects the optical axis of the Fresnel lens, and wherein the first light module is arranged on a top side of the beam stop and in combination with the optically relevant Aperture edge of the beam diaphragm contributes to the generation of a light distribution.
- the invention relates to a motor vehicle headlight with at least one lighting device according to the invention.
- a Fresnel lens (more precisely: Fresnel Fresnel lens) is an optical lens that allows the construction of large and thick lenses with a short focal length without the weight and bulk of conventional lenses.
- the Fresnel lens With the Fresnel lens, the volume is reduced by dividing it into ring-shaped areas. In each of these areas, the thickness is reduced, giving the lens a series of annular steps. Since light is only refracted on the main surface of the lens, the angle of refraction does not depend on the thickness but only on the angle between the two surfaces of a lens. The lens therefore retains its optical properties, although the image quality is affected by the stepped structure, which is irrelevant in many applications. Examples of this are lighting beam paths in headlights of all kinds.
- each step is curved and has at least one focal point, which focal point is arranged horizontally and/or vertically offset from the optical axis of the Fresnel lens, and wherein adjacent steps have different focal points from one another.
- each step or the main surface of the step has a plurality of sections, which can each have different focal points.
- the upper half of a stage has a different focal point to a lower half of the stage.
- two light images are generated, which are offset from one another in the vertical direction.
- focal points which are offset from one another in the horizontal direction, with the light images being offset from one another in the horizontal direction. If the offset light images overlap one another, blurring occurs, which is advantageous when compensating for color effects in the light-dark boundary and when the light-dark boundary is softened.
- optical axis means that optical axis which on the one hand also represents an axis of symmetry of the Fresnel lens, ie essentially intersects the Fresnel lens in the center or midpoint.
- the terms refer to a location or an orientation, such as “horizontal”, “vertical”, “in the horizontal direction”, “in the vertical direction”, “above”, “below”, “front”, “rear”. “, “under it”, “above it” etc. to a proper installation position of the projection module in question in a motor vehicle headlight.
- displaced horizontally and/or vertically includes a displacement in a horizontal plane or a vertical plane, i.e. the focal points can also be displaced along or in the direction of the optical axis.
- the beam stop to have a longitudinal axis, with the longitudinal axis of the beam stop being arranged in a horizontal plane when the lighting device is installed in a motor vehicle headlight, and with the optically relevant stop edge being set up to produce an asymmetrical light-dark boundary, and wherein the first calibration module, in combination with the optically relevant aperture edge of the beam aperture, contributes to the generation of a low-beam light distribution.
- the lighting device comprises at least one second light module with at least one light source for generating a high beam distribution.
- the low beam distribution and the high beam distribution switched on for example, form an overall light distribution, with any gap spacing between these light distributions also being projected out of focus due to the shifted focal points, which closes the resulting gap between the low beam distribution and the high beam distribution.
- the object is also achieved by a motor vehicle headlight with at least one lighting device according to the invention.
- FIG. 1 shows a side view of an exemplary lighting device with a projection lens designed as a Fresnel lens, the Fresnel lens comprising a plurality of steps which are essentially concentric with one another, and
- Fig. 2 is a cross-sectional view of a stage of the Fresnel lens of Fig. 1.
- Fig. 1 shows an exemplary lighting device 10 for a motor vehicle headlight, which lighting device comprises a first light module 100 with at least one light source for generating a low beam distribution in the direction of a main emission direction, the first light module 100 being set up to emit light beams in a main emission direction.
- the lighting device 10 includes a projection lens 300 with an optical axis A, which projection lens 300 is set up to image the light that can be generated by the first light module 100 in front of the lighting device 10, the projection lens 300 being designed as a Fresnel lens.
- the Fresnel lens comprises a base body 310 and a plurality of annular steps 320 arranged on the base body 310, which steps 320 are arranged essentially concentrically with one another, with each step 320 having a main surface 320a for projecting the light beams of the at least one light module 100 in front of the lighting device 10 and a has a ramp surface 320b extending from the base body 310 to the main surface 320a, as can be seen more clearly in FIG.
- the main surface 320a and the rising surface 320b of a step 320 form a step edge 320c in a common surface intersection line, the step edges 320c being at a distance of less than 20 ⁇ m from adjacent step edges 320c, preferably less than 10 ⁇ m, preferably less than 5 ⁇ m.
- the lighting device 10 further comprises a beam diaphragm 400 with a longitudinal axis, the longitudinal axis of the beam diaphragm 400 being arranged in a horizontal plane when the lighting device 100 is installed in a motor vehicle headlight, the beam diaphragm 400 having an optically relevant diaphragm edge 410 for generating an asymmetrical light Includes dark-boundary, where the aperture edge 410 intersects the optical axis A of the Fresnel lens.
- the first light module 100 is arranged on an upper side of the beam stop and, in combination with the optically relevant screen edge 410 of the beam stop 400, contributes to the generation of a low beam distribution.
- the terms refer to a location or an orientation, such as “horizontal”, “vertical”, “in the horizontal direction”, “in the vertical direction”, “above”, “below”, “front”, “rear”. “, “underneath”, “above” etc. to a proper installation position of the subject lighting device in a motor vehicle headlight.
- each step 320 is curved and has a focal point Fl, F2, F3, F4, which focal point Fl, F2, F3, F4 is arranged horizontally and/or vertically offset from the optical axis A of the Fresnel lens, and where adjacent stages 320 have different focal points F1, F2, F3, F4.
- the outermost stage of the Fresnel lens is assigned a focal point F1
- the next inner stage is assigned a focal point F2, and so on.
- the curved major surfaces 320a of the steps may be convex or concave; in Figure 2, the exemplary step is formed with a convex major surface 320a.
- the exemplary lighting device from FIG. 1 comprises a second light module 200 with at least one light source for generating a high beam distribution, the second light module 200 being arranged on an underside of the beam shield 400 .
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 |
|---|---|---|---|
| EP20198393.9A EP3974710A1 (de) | 2020-09-25 | 2020-09-25 | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
| PCT/EP2021/070587 WO2022063459A1 (de) | 2020-09-25 | 2021-07-22 | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4217646A1 true EP4217646A1 (de) | 2023-08-02 |
| EP4217646B1 EP4217646B1 (de) | 2024-09-25 |
Family
ID=72659633
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20198393.9A Withdrawn EP3974710A1 (de) | 2020-09-25 | 2020-09-25 | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
| EP21743214.5A Active EP4217646B1 (de) | 2020-09-25 | 2021-07-22 | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20198393.9A Withdrawn EP3974710A1 (de) | 2020-09-25 | 2020-09-25 | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US11965632B2 (de) |
| EP (2) | EP3974710A1 (de) |
| JP (1) | JP7546155B2 (de) |
| KR (1) | KR102801917B1 (de) |
| CN (1) | CN116324272A (de) |
| WO (1) | WO2022063459A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102489648B1 (ko) | 2021-02-24 | 2023-01-18 | 현대모비스 주식회사 | 차량용 램프 및 그 램프를 포함하는 차량 |
| KR102673141B1 (ko) | 2021-06-22 | 2024-06-10 | 현대모비스 주식회사 | 차량용 램프 및 그 램프를 포함하는 차량 |
| DE102022115250B4 (de) * | 2022-06-20 | 2025-02-13 | Zkw Group Gmbh | Linsenoptik zur flexiblen positionierung von lichtquellen |
| DE102022124019A1 (de) * | 2022-09-20 | 2024-03-21 | HELLA GmbH & Co. KGaA | Scheinwerfer für ein Kraftfahrzeug |
| DE102022126304A1 (de) * | 2022-10-11 | 2024-04-11 | HELLA GmbH & Co. KGaA | Fresnelprojektionslinse mit integrierter Funktion zur Bedienung der Overhead-Sign-Werte |
| DE102023105942A1 (de) * | 2023-03-09 | 2024-09-12 | Docter Optics Se | Primäroptik für einen Fahrzeugscheinwerfer |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA312030A (en) * | 1931-06-02 | A. M. Lamblin-Parent Gustave | Automobile headlight | |
| JP2587355Y2 (ja) * | 1992-12-07 | 1998-12-16 | 株式会社小糸製作所 | プロジェクタ型灯具用コンデンサーフレネルレンズ |
| KR970006280Y1 (ko) * | 1994-09-26 | 1997-06-24 | 삼립산업 주식회사 | 프레즈넬렌즈(fresnel lens)를 이용한 자동차용 조명등 |
| JPH08306216A (ja) * | 1995-04-28 | 1996-11-22 | Iwaki Glass Kk | ガラス製フレネルレンズと灯具 |
| JP2002117708A (ja) * | 2000-10-06 | 2002-04-19 | Stanley Electric Co Ltd | 車両用灯具 |
| DE10129743C2 (de) * | 2001-06-20 | 2003-05-08 | Daimler Chrysler Ag | Fahrzeugscheinwerfer, mit einer Anzahl von elektronischen Leuchtelementen als Lichtquelle |
| DE102004008296A1 (de) * | 2004-02-20 | 2005-09-08 | Daimlerchrysler Ag | Scheinwerferlinse und Scheinwerfer |
| JP4205048B2 (ja) * | 2004-02-26 | 2009-01-07 | 株式会社小糸製作所 | 車両用前照灯 |
| CN1854597A (zh) * | 2005-04-25 | 2006-11-01 | 堤维西交通工业股份有限公司 | 菲涅尔透镜投射式灯具结构 |
| US20060250811A1 (en) * | 2005-05-05 | 2006-11-09 | Hsiang-Chen Wu | Head light assembly with Fresnel lens |
| DE102005039808A1 (de) * | 2005-08-22 | 2007-03-15 | Docter Optics Gmbh | Scheinwerferlinse für einen Fahrzeugscheinwerfer |
| JP2009117279A (ja) * | 2007-11-09 | 2009-05-28 | Koito Mfg Co Ltd | 車両用前照灯 |
| JP5537989B2 (ja) * | 2010-02-24 | 2014-07-02 | スタンレー電気株式会社 | 前照灯及び複焦点レンズ |
| JP6001836B2 (ja) * | 2011-09-21 | 2016-10-05 | 日立マクセル株式会社 | フレネルレンズの製造方法および照明器具の製造方法 |
| JP2013186951A (ja) * | 2012-03-06 | 2013-09-19 | Koito Mfg Co Ltd | 車両用照明灯具 |
| JP2013195754A (ja) * | 2012-03-21 | 2013-09-30 | Stanley Electric Co Ltd | 液晶光学素子、照明装置 |
| US8894257B2 (en) * | 2012-05-17 | 2014-11-25 | Osram Sylvania Inc. | Headlamp featuring both low-beam and high-beam outputs and devoid of moving parts |
| KR101688433B1 (ko) * | 2014-09-02 | 2016-12-21 | 현대모비스 주식회사 | 돌출형 점등 이미지를 갖는 자동차용 램프 |
| WO2018166911A1 (en) * | 2017-03-17 | 2018-09-20 | Lumileds Holding B.V. | Multi-focal collimating lens and headlight assembly for an automotive low beam |
| CN107940390A (zh) * | 2017-12-21 | 2018-04-20 | 超视界激光科技(苏州)有限公司 | 远近光一体的车辆前照灯 |
| TWI629430B (zh) * | 2017-12-22 | 2018-07-11 | 財團法人工業技術研究院 | 車頭燈裝置 |
| CN108036277B (zh) * | 2017-12-25 | 2020-10-27 | 上海小糸车灯有限公司 | 一种车灯及其光路传导装置 |
| CN110067983A (zh) * | 2019-06-05 | 2019-07-30 | 华域视觉科技(上海)有限公司 | 一种车灯模组、车灯及车辆 |
| EP3974712A1 (de) * | 2020-09-23 | 2022-03-30 | ZKW Group GmbH | Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer |
-
2020
- 2020-09-25 EP EP20198393.9A patent/EP3974710A1/de not_active Withdrawn
-
2021
- 2021-07-22 CN CN202180065317.1A patent/CN116324272A/zh active Pending
- 2021-07-22 JP JP2023518481A patent/JP7546155B2/ja active Active
- 2021-07-22 US US18/026,323 patent/US11965632B2/en active Active
- 2021-07-22 WO PCT/EP2021/070587 patent/WO2022063459A1/de not_active Ceased
- 2021-07-22 KR KR1020237004429A patent/KR102801917B1/ko active Active
- 2021-07-22 EP EP21743214.5A patent/EP4217646B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP3974710A1 (de) | 2022-03-30 |
| US11965632B2 (en) | 2024-04-23 |
| JP2023543194A (ja) | 2023-10-13 |
| WO2022063459A1 (de) | 2022-03-31 |
| EP4217646B1 (de) | 2024-09-25 |
| JP7546155B2 (ja) | 2024-09-05 |
| KR20230036131A (ko) | 2023-03-14 |
| KR102801917B1 (ko) | 2025-04-30 |
| US20230358385A1 (en) | 2023-11-09 |
| CN116324272A (zh) | 2023-06-23 |
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