EP4065883B1 - Verbindung zwischen den zonen eines reflektors in einem lichtmodul mit hell-dunkel grenze - Google Patents

Verbindung zwischen den zonen eines reflektors in einem lichtmodul mit hell-dunkel grenze

Info

Publication number
EP4065883B1
EP4065883B1 EP20811665.7A EP20811665A EP4065883B1 EP 4065883 B1 EP4065883 B1 EP 4065883B1 EP 20811665 A EP20811665 A EP 20811665A EP 4065883 B1 EP4065883 B1 EP 4065883B1
Authority
EP
European Patent Office
Prior art keywords
zone
zones
luminous module
light
upper cut
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.)
Active
Application number
EP20811665.7A
Other languages
English (en)
French (fr)
Other versions
EP4065883A1 (de
Inventor
Blaise Jars
Sylvain Giraud
Nicolas VIOLET
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP4065883A1 publication Critical patent/EP4065883A1/de
Application granted granted Critical
Publication of EP4065883B1 publication Critical patent/EP4065883B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F21S41/10—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
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings
    • 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
    • F21W2102/155—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 inclined and horizontal cutoff lines

Definitions

  • the first zone is in a central position.
  • central position we mean that the zone is crossed by the optical axis of the light module.
  • the downward profile extends over more than 70% of the longitudinal extent of the first zone.
  • each of the descending steps is formed by an exterior corner and an interior corner adjacent to said exterior corner, each of said corners forming an angle between 80° and 100°.
  • the reflecting surface comprises a fourth zone extending longitudinally along one of the second and third zones, said fourth zone having lateral edges parallel to the optical axis and the reflecting surface having a transverse profile forming a descending step from said one of the second and third zones towards the fourth zone.
  • the second zone and the third zone are configured to form one or more light images without upper cutoff.
  • the reflective surface comprises a fifth zone extending longitudinally along the other of the second and third zones, said fifth zone being configured to form a light image without upper cutoff.
  • the reflection surface is on a reflector made of thermosetting material.
  • the measures of the invention are advantageous in that they make it possible to overcome the geometric and optical disturbances caused by the varnish on junctions between longitudinal zones of a reflector.
  • Providing a downward-stepping profile at the junctions makes it possible to place the inner corner in the shade of the light beam produced by the light source. This thus makes it possible to use only the portion of varnish with a thickness decreasing at the outer corner, given that this portion has a larger radius of curvature, spreading the light image produced laterally.
  • Combining an inclination of an angle ⁇ of at least one of the two edges of a zone, said at least one edge having such a downward step, with a configuration of said zone to form an image with an inclined upper cut-off, is advantageous because it makes it possible to overcome the problem of spreading the image in that the spreading then takes place along said cut-off.
  • FIG 4 also illustrates the light image produced by the area in question, on a reference frame with a horizontal axis H and a vertical axis V. The intersection of these axes corresponds to the optical axis.
  • the light image in a continuous line is the theoretical image, that is to say without disturbing effect linked to variations in thickness of the varnish as described above in relation to the Figure 2 .
  • the light images in broken lines correspond to the images resulting from the disruptive effect linked to variations in the thickness of the varnish.
  • the outer surface of the varnish has a larger radius of curvature at the upper corner of the step than the reflection surface on the bare substrate. This means that light rays incident on the lateral edges of the area will be deflected more laterally, causing horizontal spreading and, therefore, horizontal displacement of the inclined upper cut-off.
  • Figure 5 is similar to the Figure 4 with the difference that the two lateral edges of the reflection zone are inclined at an angle ⁇ relative to the optical axis, more precisely relative to a vertical plane parallel to the optical axis.
  • Figure 5 is a top view where the side edges of the areas are projected onto a plane horizontal parallel to the optical axis, and thus shows the angle ⁇ in this plane.
  • the angle ⁇ is actually between a vertical plane parallel to the optical axis and the projection of the lateral edges onto a plane perpendicular to said axis.
  • This inclination ⁇ is close to the inclination ⁇ of the light source and consequently also to the inclination ⁇ of the upper cut-off. It can be observed that the shift of the light images occurs along the direction of the upper cut-off.
  • FIG. 6 illustrates the effects of varnish coating on the groove junctions of a reflection area forming an image with a horizontal upper cutoff.
  • the outer surface of the varnish at the groove has a larger radius of curvature than that of the reflection surface on the bare substrate.
  • the profile of the outer surface of the varnish at the groove remains essentially parallel to that of the reflection surface on the bare substrate.
  • the thickness of the varnish gradually decreases up to the groove.
  • the outer surface of the varnish at the groove has a longitudinal profile which is offset from the theoretical profile, namely that of the reflection surface on the bare substrate plus the nominal thickness of varnish. This shift causes a defocusing of the light rays causing an upward deformation of the upper cut-off, as illustrated by the broken line on the light image represented on the horizontal H and vertical V axes.
  • the light module 101 comprises a reflector 102 with a substrate 102.1 made of plastic, generally extended and advantageously forming a cap.
  • the substrate 102.1 comprises a hollow face forming a reflection surface 102.2.
  • This reflection surface 102.2 is intended to be covered with a smoothing varnish and then with a metallized coating in order to make it reflective.
  • the reflection surface 102.2 has a generally parabolic longitudinal profile and comprises zones 102.2.1-102.2.7 extending longitudinally and adjacent to each other laterally. Each of the zones 102.2.1-102.2.7 has a specific geometry, so that the junctions between the zones form local geometric variations.
  • the light module 101 comprises a light source 104, in this case of the semiconductor type such as in particular a light-emitting diode, with a rectangular illuminating surface with an edge 104.1 and a rear edge 104.2. These two edges are advantageously parallel.
  • the illuminating surface has a main axis parallel to the front edge 104.1. It can be observed that this main axis and therefore the front edge 104.1 are inclined at an angle ⁇ relative to a direction perpendicular to the optical axis.
  • the inclined upper cut-off intersects, at least approximately, the intersection of the horizontal axis H and the vertical axis V.
  • the position of the luminous image in question to the right of the vertical axis V corresponds to a lighting function with cut-off for left-hand driving, it being understood that the image in question may be located to the left of said axis.
  • Zone 102.2.4 has two lateral edges inclined at an angle ⁇ relative to the optical axis. The remarks relating to this angle made previously in relation to the Figure 5 apply to the figure 8 .
  • Zone 102.2.4 producing the oblique upper cut-off light image has lateral edges forming steps descending laterally towards the directly adjacent zones, namely zones 102.2.3 and 102.2.5.
  • the combination of the descending steps and the inclination of an angle ⁇ of the lateral edges with respect to the optical axis allows the optical disturbances produced by the varnish at the junctions with the adjacent zones not to substantially modify the position of the inclined upper cut.
  • Zone 102.2.6 producing the luminous image with horizontal upper cut-off is directly adjacent to zone 102.2.5.
  • zone 102.2.7 involved in producing the laterally extended luminous image without upper cut-off is directly adjacent to zone 102.2.6.
  • the junctions between zone 102.2.5 and zone 102.2.6 as well as between zone 102.2.6 and zone 102.2.7 also form descending steps (laterally outwards).
  • the presence of a downward junction at the edge outer lateral edge of zone 102.2.6 allows optical disturbances produced by the varnish at the junction with the adjacent zone 102.2.7 not to substantially modify the position of the horizontal upper cut-off.
  • the inner corner of the descending step is located in the shadow of the light rays of the light source, meaning that the geometric variations caused by the varnish at this location have no impact on the light image produced.
  • Zones 102.2.1, 102.2.2, 102.2.3, 102.5 and 102.2.7 together form the laterally extended light image without an upper cut-off.
  • the junctions between these zones more specifically from zone 102.2.3 to zone 102.2.1, and from zone 102.2.5 to zone 102.2.6, form descending steps.
  • the optical disturbances produced by the varnish at these junctions will laterally shift the light image produced, which is acceptable.
  • the figures 10 And 11 illustrate a zone reflector, of the type of that of the Figure 1 , according to a second embodiment of the invention.
  • the Figure 10 is a schematic representation, seen from above, of the module as well as a schematic representation of the light images produced by the different zones.
  • the Figure 11 is a sectional view XI-XI of the reflector of the Figure 10 .
  • the reference signs of the first embodiment are used to designate identical elements. or correspondents, these numbers being increased by 100. Reference is also made to the description of these elements.
  • the central area 202.2.3 of the reflection surface is configured to produce a light image with an inclined upper cutoff and has side edges inclined at an angle ⁇ relative to the optical axis.
  • the remarks relating to this angle made previously in relation to the Figure 5 apply to the Figure 10 .
  • the reflection surface 202.2 comprises two zones 202.2.2 and 202.2.4 producing a light image with a horizontal upper cutoff, these two zones being directly adjacent to the central zone 202.2.3.
  • the reflection surface 202.2 comprises outer (laterally) zones for forming a laterally extended light image without upper cutoff, in this case the zones 202.2.1 and 202.2.5.
  • junctions external that is to say with the external zones 202.2.1 and 202.2.5, they are in the form of a descending step, meaning that the progressive reduction in thickness of the varnish towards the external corner of each of these steps will spread the light image somewhat without modifying the vertical position of the horizontal upper cut.
  • the descending step(s) have a height greater than 0.5mm and/or less than 2.5mm.
  • Each of the interior and exterior corners advantageously forms an angle of between 80° and 100°.

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)
  • Optical Elements Other Than Lenses (AREA)

Claims (13)

  1. Leuchtmodul (101; 201) insbesondere für ein Kraftfahrzeug, umfassend:
    - eine Lichtquelle (104; 204), die geeignet ist, Lichtstrahlen zu emittieren;
    - eine Reflexionsfläche (102.2; 202.2), die dazu bestimmt ist, mit einem Lack überzogen zu werden, und dazu ausgestaltet ist, die Lichtstrahlen so zu reflektieren, dass ein Lichtbündel mit oberer Hell-Dunkel-Grenze gebildet wird, die Reflexionsfläche umfassend eine erste Zone (102.2.4; 202.2.3), die sich längs entlang einer optischen Achse des Leuchtmoduls erstreckt und dazu ausgestaltet ist, ein Lichtbild mit oberer Hell-Dunkel-Grenze zu bilden, und eine zweite Zone (102.2.3; 202.2.2) und eine dritte Zone (102.2.5; 202.2.4), die sich längs entlang der ersten Zone (102.2.4; 202.2.3) auf der einen bzw. der anderen Seite der ersten Zone erstrecken;
    dadurch gekennzeichnet, dass
    die Reflexionsfläche (102.2; 202.2) ein Querprofil, d. h. senkrecht zu der optischen Achse des Leuchtmoduls verlaufendes, aufweist, das eine abfallende Stufe von der ersten Zone (102.2.4; 202.2.3) aus zu jeder der zweiten (102.2.3; 202.2.2) und dritten (102.2.5; 202.2.4) Zonen bildet,
    und dass die obere Hell-Dunkel-Grenze des Lichtbilds mit oberer Hell-Dunkel-Grenze, das durch die erste Zone (102.2.4; 202.2.3) der reflektierenden Fläche (102.2; 202.2) gebildet wird, eine Neigung um einen Winkel β in Bezug auf eine horizontale Richtung (H) aufweist, wobei die erste Zone seitliche Ränder aufweist, die eine Neigung um einen Winkel γ in Bezug auf eine zu der optischen Achse parallele vertikale Ebene bildet, und wobei |β - γ| ≤ 10°,
    und dass die Lichtquelle (104; 204) vom Halbleitertyp mit einer ebenen beleuchtenden Fläche ist, wobei die beleuchtende Fläche einen vorderen Rand (104.1; 204.1) aufweist, der um einen Winkel α in Bezug auf eine senkrecht zu der optischen Achse verlaufende Richtung und in der Ebene der beleuchtenden Fläche geneigt ist, wobei die Neigungen α und β gleich sein können, aber nicht unbedingt, wobei sie ähnlich bleiben, zum Beispiel mit einer Differenz von höchstens 5°.
  2. Leuchtmodul (101; 201) nach Anspruch 1, dadurch gekennzeichnet, dass das Profil der abfallenden Stufe sich über mehr als 70 % der Längserstreckung der ersten Zone (102.2.4; 202.2.3) erstreckt.
  3. Leuchtmodul (101; 201) nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass jede der abfallenden Stufen eine Höhe von mehr als 0,5 mm und/oder weniger als 2,5 mm aufweist.
  4. Leuchtmodul (101; 201) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass jede der abfallenden Stufen durch eine Außenecke und eine zu der Außenecke benachbarte Innenecke gebildet wird, wobei jede der Ecken einen Winkel zwischen 80° und 100° bildet.
  5. Leuchtmodul (101; 201) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Winkel β zwischen 15° und 45° beträgt und der Winkel γ größer als oder gleich 5° ist.
  6. Leuchtmodul (101; 201) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die reflektierende Fläche (102.2; 202.2) eine vierte Zone (102.2.2, 102.2.6; 202.2.1, 202.2.5) umfasst, die sich längs entlang einer der zweiten (102.2.3; 202.2.2) und dritten (102.2.5; 202.2.4) Zonen erstreckt, wobei die vierte Zone zu der optischen Achse parallele seitliche Ränder aufweist und die Reflexionsfläche ein Querprofil aufweist, das eine abfallende Stufe von der einen der zweiten und dritten Zonen aus zu der vierten Zone hin bildet.
  7. Leuchtmodul (201) nach Anspruch 6, dadurch gekennzeichnet, dass mindestens eine der zweiten (202.2.2) und dritten (202.2.4) Zonen einen zu der optischen Achse parallelen äußeren seitlichen Rand aufweist, wobei das Lichtbild der mindestens einen der zweiten und dritten Zonen eine horizontale obere Hell-Dunkel-Grenze aufweist, und die vierte Zone (202.2.1, 202.2.5) dazu ausgestaltet ist, ein Lichtbild ohne obere Hell-Dunkel-Grenze zu bilden.
  8. Leuchtmodul (101) nach Anspruch 6, dadurch gekennzeichnet, dass die vierte Zone (102.2.6) dazu ausgestaltet ist, ein Lichtbild mit einer horizontalen oberen Hell-Dunkel-Grenze zu bilden.
  9. Leuchtmodul (101) nach Anspruch 8, dadurch gekennzeichnet, dass die zweite Zone (102.2.3) und die dritte Zone (102.2.5) dazu ausgestaltet sind, ein oder mehrere Lichtbilder ohne obere Hell-Dunkel-Grenze zu bilden.
  10. Leuchtmodul (101; 201) nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass die reflektierende Fläche (102.2; 202.2) eine fünfte Zone (102.2.2; 202.2.5, 202.2.1) umfasst, die sich längs entlang der anderen (102.2.3; 202.2.4, 202.2.2) der zweiten und dritten Zonen erstreckt, wobei die fünfte Zone dazu ausgestaltet ist, ein Lichtbild ohne obere Hell-Dunkel-Grenze zu bilden.
  11. Leuchtmodul (101; 201) nach Anspruch 10, dadurch gekennzeichnet, dass der Winkel α größer als oder gleich 10° und/oder kleiner als oder gleich 45° ist.
  12. Leuchtmodul (101; 201) nach einem der Ansprüche 1 bis 4, 5, 7, 8, 9 und 10, dadurch gekennzeichnet, dass die erste Zone (102.2.4; 202.2.3) der reflektierenden Fläche (102.2; 202.2) lotrecht zu der Lichtquelle (104; 204) ist.
  13. Leuchtmodul (101; 201) nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass die Reflexionsfläche (102.2; 202.2) auf einem Reflektor (101; 202) aus wärmehärtbarem Material ist.
EP20811665.7A 2019-11-29 2020-11-27 Verbindung zwischen den zonen eines reflektors in einem lichtmodul mit hell-dunkel grenze Active EP4065883B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1913561A FR3103878B1 (fr) 2019-11-29 2019-11-29 RACCORDEMENT ENTRE ZONES D’UN REFLECTEUR DE MODULE LUMINEUX à COUPURE
PCT/EP2020/083814 WO2021105490A1 (fr) 2019-11-29 2020-11-27 Raccordement entre zones d'un reflecteur de module lumineux a coupure

Publications (2)

Publication Number Publication Date
EP4065883A1 EP4065883A1 (de) 2022-10-05
EP4065883B1 true EP4065883B1 (de) 2025-07-23

Family

ID=69375631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20811665.7A Active EP4065883B1 (de) 2019-11-29 2020-11-27 Verbindung zwischen den zonen eines reflektors in einem lichtmodul mit hell-dunkel grenze

Country Status (5)

Country Link
EP (1) EP4065883B1 (de)
JP (1) JP7313561B2 (de)
CN (1) CN114729736B (de)
FR (1) FR3103878B1 (de)
WO (1) WO2021105490A1 (de)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710095A (en) * 1970-09-23 1973-01-09 Gen Motors Corp Method of making a faceted reflector for a lighting unit
US4704661A (en) * 1986-08-25 1987-11-03 General Electric Company Faceted reflector for headlamps
FR2858042B1 (fr) * 2003-07-24 2005-09-23 Valeo Vision Module d'eclairage elliptique sans cache realisant un faisceau d'eclairage a coupure et projecteur comportant un tel module
CN101570155B (zh) * 2008-05-04 2012-03-28 法雷奥视觉公司 用于机动车的双功能头灯
JP5460225B2 (ja) 2009-10-09 2014-04-02 株式会社小糸製作所 車両用前照灯装置
JP5722691B2 (ja) * 2011-04-22 2015-05-27 株式会社小糸製作所 車両用前照灯
JP5842435B2 (ja) * 2011-07-26 2016-01-13 市光工業株式会社 車両用前照灯
JP2016076389A (ja) * 2014-10-07 2016-05-12 株式会社小糸製作所 車両用灯具
FR3035704B1 (fr) 2015-04-28 2018-06-15 Valeo Vision Procede de fabrication d'un reflecteur pour dispositif d'eclairage et/ou de signalisation
FR3047541B1 (fr) * 2015-12-10 2019-10-04 Valeo Vision Module d'eclairage automobile avec fonctions code et route combinees et une source lumineuse ajustable
KR101873441B1 (ko) * 2016-12-27 2018-08-02 에스엘 주식회사 차량용 램프
FR3074261B1 (fr) 2017-11-30 2020-10-23 Valeo Vision Reflecteur pour dispositif d'eclairage
JP7058166B2 (ja) * 2018-04-10 2022-04-21 株式会社小糸製作所 車両用前照灯

Also Published As

Publication number Publication date
JP7313561B2 (ja) 2023-07-24
FR3103878B1 (fr) 2022-07-08
EP4065883A1 (de) 2022-10-05
CN114729736A (zh) 2022-07-08
WO2021105490A1 (fr) 2021-06-03
JP2023520746A (ja) 2023-05-19
CN114729736B (zh) 2024-09-03
FR3103878A1 (fr) 2021-06-04

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