EP3775677B1 - Dunkel erscheinende lichtvorrichtung für ein kraftfahrzeug - Google Patents

Dunkel erscheinende lichtvorrichtung für ein kraftfahrzeug Download PDF

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Publication number
EP3775677B1
EP3775677B1 EP19720983.6A EP19720983A EP3775677B1 EP 3775677 B1 EP3775677 B1 EP 3775677B1 EP 19720983 A EP19720983 A EP 19720983A EP 3775677 B1 EP3775677 B1 EP 3775677B1
Authority
EP
European Patent Office
Prior art keywords
light
external indicator
indicator light
lighting device
frame
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
EP19720983.6A
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English (en)
French (fr)
Other versions
EP3775677A1 (de
Inventor
Stéphanie BERGERAT
Franck ARRIVET
Yann KUSIAK
Alain Buisson
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.)
Marelli Automotive Lighting France SAS
Original Assignee
Marelli Automotive Lighting France 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
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Publication of EP3775677A1 publication Critical patent/EP3775677A1/de
Application granted granted Critical
Publication of EP3775677B1 publication Critical patent/EP3775677B1/de
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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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—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
    • 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
    • F21S43/255—Filters
    • 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
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting 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
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/10—Position lights
    • 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
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/35—Brake lights

Definitions

  • the present invention relates to the technical field of lighting and/or light signaling. It relates more particularly to a lighting and/or signaling device for a motor vehicle.
  • These light devices comprise reflective surfaces making it possible to direct the light beam emitted by a light source outwards and in a desired direction.
  • Metallic surfaces are favored because of their high reflection coefficient, such as chrome or aluminum. In daylight, these metallic surfaces are characterized by a light tone color, which can cause an unwanted contrast with the color of the bodywork. This is particularly the case when the bodywork is painted in a color whose tone is dark, locally and pronouncedly modifying the aesthetic appearance of the vehicle in daylight.
  • the present invention aims to resolve this problem by proposing a luminous device whose external appearance, when turned off, is dark in color and homogeneous in daylight.
  • the present invention proposes a lighting device for a motor vehicle, according to claim 1.
  • the exterior LED has a dark tone or dark tone color, to darken the interior of the optical housing when the light device is turned off and exposed to daylight.
  • the exterior indicator light is characterized by a homogeneous color in daylight.
  • a translucent screen is interposed between the optical reflector and the external indicator, so as to homogenize the daylight reflected by the different elements present inside the optical housing.
  • the translucent screen is placed at a distance from the external indicator in order to attenuate the contrast in luminous intensity of the daylight reflected by the different elements constituting the optical housing. Sufficient space is maintained between the translucent screen and the external indicator, to promote better dissipation of humidity between the translucent screen and the external indicator.
  • the exterior indicator light is black in color.
  • the color of the exterior indicator light may vary depending on the color of the body of the motor vehicle on which the light device is intended to be mounted.
  • the color of the exterior indicator light can also be blue, red or other.
  • the gap between the translucent screen and the external indicator is between 1 mm and 10 mm, preferably between 2 mm and 4 mm. These ranges of values are favorable for obtaining a luminous device with a very dark appearance in daylight and when it is turned off, while limiting its size depending on the direction of propagation of the light emitted by the light source of said device.
  • the exterior indicator has a thickness of between 2 mm and 3.5 mm, preferably of the order of 2.2 mm.
  • the exterior indicator absorbs between 80% and 95% of the intensity of daylight, preferably of the order of 90%.
  • the optical housing is preferably opaque to daylight, so that daylight only enters the optical housing through the external indicator light.
  • a light beam at normal incidence is diffused by the translucent screen, in a diffusion angle range of between 0° and 41°, preferably between 0° and 20°.
  • the translucent screen includes a pattern visible, through the external indicator, when the light source is turned on.
  • the pattern is screen printed and/or inlaid into the translucent screen.
  • the light device comprises a frame, placed between the light source and the translucent screen, the frame comprises at least one opening allowing at least part of the light beam emitted by the light source to pass through.
  • the frame masks at least part of the interior of the housing in order to promote greater homogenization of the light reflected by the interior of said housing.
  • the frame closes a part of the optical housing comprising the light source.
  • the translucent screen covers at least in part the surface of the frame facing the external indicator, preferably the translucent screen covers the entire surface of the frame facing the external indicator.
  • the surface of the frame facing the external indicator has a dark or obscure color, preferably a color similar to the external indicator or black.
  • the surface of the frame facing the exterior indicator light is parallel or substantially parallel to the exterior indicator light to promote a uniform tint of the exterior indicator light when the light device is turned off and exposed to daylight.
  • the present invention also relates to a motor vehicle comprising at least one lighting device according to one of the preceding claims.
  • the invention proposes a luminous device whose external appearance, when turned off, is dark in color and homogeneous in daylight.
  • THE figures 1 and 2 illustrate a non-limiting embodiment of a light device 2 according to the invention, intended to be used as a position light or lantern by a motor vehicle.
  • the light device 2 comprises an optical housing 4 in which two light sources 6A and 6B are present.
  • a first light source 6A is configured to emit an amber-colored light beam to signal the driver's intention to change lanes or turn.
  • a second light source 6B is configured to emit a red light beam to signal the position of the motor vehicle and/or its braking.
  • Each light source comprises one or more light-emitting diodes held at the same front face of a printed circuit plate 8. In known manner, the plate 8 allows a control device not shown in the figures, to control the operation of the light sources 6A and 6B.
  • the optical housing 4 also includes a thermal radiator 10 which extends along the rear face of the plate. The heat emitted by the thermal radiator 10 is evacuated outside the optical housing 4 via a vent 12.
  • the light sources are oriented so that their light beam passes through the same opening 14 of the optical housing 4.
  • the opening 14 is located at a distance from the light sources 6, between 25 mm and 80 mm, of preferably around 50 mm.
  • an optical reflector 16 is associated with each light source.
  • the optical reflectors are characterized by a surface with a high reflection coefficient on their internal face.
  • the opening 14 is closed by an external indicator light 18.
  • the indicator light exterior is partially transparent to the light beams emitted by the light sources, so that the light device can emit light signals visible to other conductors.
  • the exterior indicator light is transparent or translucent in daylight.
  • the elements present in the optical box are therefore visible through the exterior indicator light, which locally and very significantly modifies the appearance of the body of the motor vehicle in daylight.
  • the present invention proposes to replace the external indicator lights usually used, with an external indicator light 18 characterized by a homogeneous color of dark or obscure hue in order to very strongly limit the quantity of daylight passing through said indicator light.
  • the term “daylight” means all forms of light coming from the sun, direct and indirect.
  • the exterior indicator has a color whose trichromatic coordinates are included in the following value ranges: for red between 0.4 and 0.5; for green between 0.35 and 0.45 and for blue between 0.1 and 0.2.
  • the exterior indicator has a color whose trichromatic coordinates are of the order of 0.441 for red, 0.408 for green and 0.153 for blue.
  • the exterior indicator 18 has a thickness of between 2 mm and 3.5 mm, preferably of the order of 2.2 mm.
  • the thickness of the external indicator 18 is here defined according to the direction of incidence of the light beams emitted by the light sources 6 on said indicator.
  • the exterior light 18 is characterized by an absorption of daylight which is between 80% and 95%, preferably of the order of 90%.
  • the exterior indicator 18 is made from one of the following materials: polymethyl methacrylate (PMMA) or polycarbonate (PC).
  • the optical housing 4 also includes a frame 20 bearing on the internal walls of the optical housing 4.
  • the frame 20 closes a part of said housing, comprising the sources of light. light 6 and the optical reflectors 16.
  • the frame has a front face 22 parallel or substantially parallel to the external indicator light 18.
  • the front face 22 is opaque to daylight in order to form a background of dark and homogeneous color.
  • the frame also has passages 24 extending the optical reflectors, so as to allow the light sources to illuminate the external indicator 18.
  • the entire surface of the front face 22 of the frame 20 is covered by a translucent screen 26.
  • the translucent screen 26 is characterized by a thickness of between 0.1 mm and 3 mm, preferably of the order of 0.3 mm.
  • the thickness of the translucent screen is defined here according to the direction of incidence of the light beams emitted by the light sources 6A and 6B on said screen.
  • the front face 22 of the translucent screen facing the external indicator 18 promotes the reflection of a light beam under normal incidence, in a reflection angle range between 0° and 41° , preferably between 0° and 20°.
  • the front face 28 of the translucent screen 26 may include relief patterns produced by a molding technique.
  • the translucent screen is made from one of the following materials: polymethyl methacrylate (PMMA) or polycarbonate (PC).
  • the frame 20 maintains the translucent screen 26 at a distance from the external indicator 18 which is between 1 mm and 10 mm, preferably between 2 mm and 4 mm, preferably of the order of 3 mm.
  • the optical housing 4 may include vents, not shown, to promote air flow between the frame 20 and the external indicator 18.
  • the light sources 6A and 6B mentioned above are chosen so as to be able to emit light signals through the external indicator light 18 that comply with the standards in force.
  • the first light source 6A is configured to emit a light beam whose light intensity is between 5 lm and 200 lm depending on the desired function.
  • the second light source 6B is configured to emit a light beam whose light intensity is between 5 lm and 200 lm, depending on the desired function.
  • the light device 2 is characterized by a particular arrangement between the external light 18 of dark color, the frame 20 and the translucent screen 26. As illustrated in the figure 2 , this arrangement advantageously makes it possible to absorb the majority of the light intensity of daylight 30, so that the light sources 6A and 6B and their optical reflector 16 are not visible from outside the light device 2. As a result, when it is turned off, the light device appears very dark and very homogeneous in color in daylight. A lighting device according to the invention thus makes it possible to avoid, or at least reduce, a color contrast with the bodywork of a dark-colored motor vehicle.

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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)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Claims (9)

  1. Lichtvorrichtung (2) für ein Kraftfahrzeug mit einem optischen Gehäuse (4), in dem eine Lichtquelle (6A, 6B) und ein optischer Reflektor (16), der dazu ausgelegt ist, einen von der Lichtquelle (6A, 6B) ausgesandten Lichtstrahl durch eine Öffnung (14) des optischen Gehäuses zu führen, vorhanden sind, wobei die Öffnung (14) durch eine äußere Abdeckung (14) verschlossen ist, um die Lichtquelle (6A, 6B) und den optischen Reflektor (16) vor Unwetter zu schützen, wobei die äußere Abdeckung (18) bei Tageslicht schwarz oder farbig ist,
    dadurch gekennzeichnet, daß die äußere Abdeckung (18) zwischen 80% und 95% der Lichtstärke des Tageslichts absorbiert und daß ein durchscheinender Schirm (26) zwischen dem optischen Reflektor (16) und der äußeren Abdeckung (18) angeordnet ist, um das von den verschiedenen, im Inneren des optischen Gehäuses vorhandenen Elementen reflektierte Tageslicht zu homogenisieren, und daß ein Rahmen (20) zwischen der Lichtquelle (6A, 6B) und dem durchscheinenden Schirm (26) angeordnet ist, wobei der Rahmen (20) mindestens eine Öffnung aufweist, die mindestens einen Teil des von der Lichtquelle (6A, 6B) ausgesandten Lichtstrahls durchläßt, und daß der Rahmen (20) mindestens einen Teil des Inneren des Gehäuses bedeckt, um eine größere Homogenisierung des vom Inneren des Gehäuses reflektierten Lichts zu fördern, und daß die Oberfläche des Rahmens gegenüber der äußeren Abdeckung (18) parallel oder im Wesentlichen parallel zur äußeren Abdeckung ist und daß der durchscheinende Schirm (26) die Oberfläche des Rahmens (20) gegenüber der äußeren Abdeckung (18) mindestens teilweise bedeckt.
  2. Lichtvorrichtung (2) gemäß dem vorangehenden Anspruch, dadurch gekennzeichnet, daß die äußere Abdeckung (18) von blauer, roter oder anderer Farbe ist.
  3. Lichtvorrichtung (2) gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Abstand zwischen dem durchscheinenden Schirm (26) und der äußeren Abdeckung (18) zwischen 1 mm und 10 mm, vorzugsweise zwischen 2 mm und 4 mm beträgt.
  4. Lichtvorrichtung (2) gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die äußere Abdeckung (18) eine Dicke zwischen 2 mm und 3,5 mm, vorzugsweise von in etwa 2,2 mm hat.
  5. Lichtvorrichtung (2) gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß ein Lichtstrahl unter rechtwinkligem Einfall durch den durchscheinenden Schirm (26) in einem Reflexionswinkelbereich zwischen 0° und 41°, vorzugsweise zwischen 0° und 20° gestreut wird.
  6. Lichtvorrichtung (2) gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der durchscheinende Schirm (26) durch die äußere Abdeckung (18) hindurch ein Motiv aufweist, das sichtbar ist, wenn die Lichtquelle (6A, 6B) eingeschaltet ist.
  7. Lichtvorrichtung (2) gemäß dem vorangehenden Anspruch, dadurch gekennzeichnet, daß das Motiv aufgedruckt und/oder in den durchscheinenden Schirm (26) eingebettet ist.
  8. Lichtvorrichtung (2) gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Oberfläche des Rahmens (20) gegenüber der äußeren Abdeckung (18) eine gedeckte oder dunkle Farbe, vorzugsweise eine ähnliche Farbe wie die äußere Abdeckung (18) hat.
  9. Kraftfahrzeug mit mindestens einer Lichtvorrichtung (2) gemäß einem der vorangehenden Ansprüche.
EP19720983.6A 2018-04-10 2019-04-08 Dunkel erscheinende lichtvorrichtung für ein kraftfahrzeug Active EP3775677B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1853140A FR3079910B1 (fr) 2018-04-10 2018-04-10 Dispositif lumineux d'apparence sombre pour vehicule automobile
PCT/FR2019/050812 WO2019197761A1 (fr) 2018-04-10 2019-04-08 Dispositif lumineux d'apparence sombre pour véhicule automobile

Publications (2)

Publication Number Publication Date
EP3775677A1 EP3775677A1 (de) 2021-02-17
EP3775677B1 true EP3775677B1 (de) 2023-09-20

Family

ID=62223026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19720983.6A Active EP3775677B1 (de) 2018-04-10 2019-04-08 Dunkel erscheinende lichtvorrichtung für ein kraftfahrzeug

Country Status (8)

Country Link
EP (1) EP3775677B1 (de)
JP (1) JP7233440B2 (de)
KR (1) KR20210046584A (de)
CN (1) CN112219063A (de)
ES (1) ES2966991T3 (de)
FR (1) FR3079910B1 (de)
PL (1) PL3775677T3 (de)
WO (1) WO2019197761A1 (de)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487206A (en) * 1967-04-10 1969-12-30 Ford Motor Co Concealed vehicle running light assembly
US3514589A (en) * 1969-07-25 1970-05-26 Ford Motor Co Concealed vehicle running light assembly
US4153928A (en) * 1977-11-30 1979-05-08 General Motors Corporation Motor vehicle tail lamp assembly
DE3636383A1 (de) * 1986-10-25 1988-04-28 Swf Auto Electric Gmbh Signalleuchte, insbesondere fuer kraftfahrzeuge
DE8703615U1 (de) * 1987-03-11 1987-04-16 Hella KG Hueck & Co., 59557 Lippstadt Fahrzeugleuchte
GB2265977B (en) * 1992-04-08 1995-06-28 Sec Dep For Transport The Improvements in or relating to indicator lamps
CN201448753U (zh) * 2009-05-08 2010-05-05 张颍凯 一种带金属遮光罩的汽车卤素灯
JP5651025B2 (ja) * 2011-01-20 2015-01-07 本田技研工業株式会社 ヘッドライト

Also Published As

Publication number Publication date
ES2966991T3 (es) 2024-04-25
WO2019197761A1 (fr) 2019-10-17
CN112219063A (zh) 2021-01-12
PL3775677T3 (pl) 2024-03-04
KR20210046584A (ko) 2021-04-28
FR3079910A1 (fr) 2019-10-11
JP2021521587A (ja) 2021-08-26
FR3079910B1 (fr) 2021-06-04
EP3775677A1 (de) 2021-02-17
JP7233440B2 (ja) 2023-03-06

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