WO2021115775A1 - Dispositif d'éclairage pour véhicule - Google Patents

Dispositif d'éclairage pour véhicule Download PDF

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Publication number
WO2021115775A1
WO2021115775A1 PCT/EP2020/083146 EP2020083146W WO2021115775A1 WO 2021115775 A1 WO2021115775 A1 WO 2021115775A1 EP 2020083146 W EP2020083146 W EP 2020083146W WO 2021115775 A1 WO2021115775 A1 WO 2021115775A1
Authority
WO
WIPO (PCT)
Prior art keywords
barrel
contact area
holder
lighting device
vehicle lighting
Prior art date
Application number
PCT/EP2020/083146
Other languages
English (en)
Inventor
Lotfi REDJEM SAAD
Clement RONGIER
Sebastien ROELS
Original Assignee
Valeo Vision
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 filed Critical Valeo Vision
Priority to EP20808156.2A priority Critical patent/EP4073420A1/fr
Publication of WO2021115775A1 publication Critical patent/WO2021115775A1/fr

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
    • 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
    • F21S41/10—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]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel 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
    • F21S41/29—Attachment thereof
    • 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

Definitions

  • This invention is related to the field of the internal design of vehicle lighting devices, to avoid excessive temperature increase therein.
  • LED Light Emitting Diodes
  • the invention provides a solution for the aforementioned technical problem by means of a vehicle lighting device comprising:
  • a light source installed in the housing, configured to emit a light pattern
  • a holder element comprising a first holder contact area, the first holder contact area being arranged to connect the first barrel contact area to the housing;
  • the light source comprises a plurality of solid- state light sources.
  • solid state refers to light emitted by solid-state electroluminescence, which uses semiconductors to convert electricity into light. Compared to incandescent lighting, solid state lighting creates visible light with reduced heat generation and less energy dissipation.
  • the typically small mass of a solid-state electronic lighting device provides for greater resistance to shock and vibration compared to brittle glass tubes/bulbs and long, thin filament wires. They also eliminate filament evaporation, potentially increasing the lifespan of the illumination device.
  • Some examples of these types of lighting comprise semiconductor light-emitting diodes (LEDs), organic light-emitting diodes (OLED), or polymer light-emitting diodes (PLED) as sources of illumination rather than electrical filaments, plasma or gas.
  • the support barrel is a part which is commonly used in some solid-state light source devices. This barrel is used as a support for a plurality of lenses which project the light pattern emitted by the light sources. This barrel tends to overheat due to light absorption and this invention provides a way of avoiding this overheating.
  • the surface of the second barrel contact area is greater than the surface of the first barrel contact area.
  • At least a portion of the second barrel contact area is in direct contact with the second holder contact area.
  • At least a portion of the second barrel contact area is in thermal contact with the second holder contact area by the interposition of an additional conductive element.
  • the interposition of an additional conductive element is useful when the geometry of the lighting device does not allow a direct contact, or when the additional conductive element has a higher thermal conductivity than the holder element itself.
  • the additional conductive element is a conductive glue. In other particular embodiments, the additional conductive element is a metallic ring.
  • At least a portion of the second barrel contact area forms between 2 Q and 5 Q with at least a portion of the second holder contact area.
  • FIG. 1 shows a section view of a particular embodiment of a vehicle lighting device according to the invention.
  • FIG. 2 shows a section view of an alternative particular embodiment of a vehicle lighting device according to the invention.
  • FIG. 3 shows a perspective view of some of the elements of the particular embodiment of Figure 2.
  • FIG. 4 shows a thermal analysis of the embodiment of Figure 2.
  • Figure 1 shows a section view of a particular embodiment of a vehicle lighting device 1 according to the invention.
  • the vehicle lighting device 10 comprises
  • the plurality of LEDs 2 are installed in the housing and are configured to emit a light pattern, due to their particular arrangement. This light pattern is received and projected by the plurality of lenses 5, which are arranged to as to provide a final pattern to perform a particular lighting functionality.
  • the support barrel 3 is intended to provide a support for the plurality of lenses 5.
  • This support barrel 3 comprises a barrel surface 30 and a first barrel contact area 31 which protrudes from the barrel surface 30.
  • This first barrel contact area 31 is used to attach the support barrel to the first holder contact area 41 of the holder element 4, which is in turn attached to the housing 1.
  • the first barrel contact area 31 is the attachment point of the support barrel 3 to the housing 1 , via the holder element 4.
  • the support barrel 3 further comprises a second barrel contact area 32, with a surface greater than the surface of the first barrel contact area 31.
  • This second barrel contact area 32 is in thermal contact with a second holder contact area 42 of the holder element 4, thus creating a thermal path for heat dissipation between the barrel 3 and the holder 4.
  • Heat coming from the light absorption performed by the barrel 3 is conducted along the conductive surface of the barrel and then dissipated by the holder 4, due to the thermal contact between the second barrel contact area 32 and the second holder contact area 42, so that the lenses 5 do not reach a dangerous temperature.
  • the second barrel contact area 32 is in contact with the second holder contact area 42, by the mere interposition of a conductive glue layer. This contact saves space and provides the barrel 3 with a good heat dissipation path.
  • the shape and size of the contact zone may be designed as a function of the heat dissipation needs of the lighting device.
  • At least a portion of the second barrel contact area 32 forms between 2 Q and 5 Q with at least a portion of the second holder contact area 42.
  • Figure 2 shows a section view of an alternative embodiment of a lighting device according to the invention.
  • This figure also illustrates an embodiment with a housing 1 , a plurality of LEDs 2 installed in the housing 1 , a support barrel 3, a holder element 4 and a plurality of lenses 5, with the same operation functionalities as in the embodiment of Figure 1.
  • Figure 3 shows a perspective view of some of the elements of the particular embodiment of Figure 2.
  • Figure 4 shows a thermal analysis of the embodiment of Figure 1.

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)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

L'invention concerne un dispositif d'éclairage pour véhicule (10) comprenant un boîtier (1), une source de lumière (2) installée dans le boîtier (1), un cylindre de support (3), un élément de retenue (4) et une pluralité de lentilles (5). Le cylindre de support (3) comprend une première zone de contact de cylindre (31) à fixer à l'élément de retenue (4) et comprend en outre au moins une seconde zone de contact de cylindre (32) qui est en contact thermique avec une seconde zone de contact de retenue (42) de l'élément de retenue (4).
PCT/EP2020/083146 2019-12-11 2020-11-24 Dispositif d'éclairage pour véhicule WO2021115775A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20808156.2A EP4073420A1 (fr) 2019-12-11 2020-11-24 Dispositif d'éclairage pour véhicule

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1914207 2019-12-11
FR1914207A FR3104680B1 (fr) 2019-12-11 2019-12-11 Dispositif d'éclairage de véhicule

Publications (1)

Publication Number Publication Date
WO2021115775A1 true WO2021115775A1 (fr) 2021-06-17

Family

ID=72178576

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/083146 WO2021115775A1 (fr) 2019-12-11 2020-11-24 Dispositif d'éclairage pour véhicule

Country Status (3)

Country Link
EP (1) EP4073420A1 (fr)
FR (1) FR3104680B1 (fr)
WO (1) WO2021115775A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3125105B1 (fr) * 2021-07-12 2023-10-06 Valeo Vision Module lumineux de véhicule automobile comprenant un organe de maintien de l’optique de projection

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936686A (en) * 1973-05-07 1976-02-03 Moore Donald W Reflector lamp cooling and containing assemblies
US20100097579A1 (en) * 2008-10-16 2010-04-22 Hon Hai Precision Industry Co., Ltd. Lens module having thermal dissipation structure and projector using same
US20110025986A1 (en) * 2009-07-29 2011-02-03 Yen-Feng Ko Projector and lens thereof
JP2016001270A (ja) * 2014-06-12 2016-01-07 株式会社リコー 光学ユニット及び画像投影装置
EP3109541A1 (fr) * 2014-02-17 2016-12-28 Stanley Electric Co., Ltd. Phare de véhicule
US20170153002A1 (en) * 2015-11-27 2017-06-01 Valeo Vision Motor vehicle headlight lighting module and associated headlight
DE202018104105U1 (de) * 2017-07-19 2018-07-30 Ford Global Technologies, Llc Fahrzeugleuchtbaugruppe mit verbesserter Wärmeableitung
CN108873579A (zh) * 2018-06-19 2018-11-23 青岛海信激光显示股份有限公司 投影设备

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936686A (en) * 1973-05-07 1976-02-03 Moore Donald W Reflector lamp cooling and containing assemblies
US20100097579A1 (en) * 2008-10-16 2010-04-22 Hon Hai Precision Industry Co., Ltd. Lens module having thermal dissipation structure and projector using same
US20110025986A1 (en) * 2009-07-29 2011-02-03 Yen-Feng Ko Projector and lens thereof
EP3109541A1 (fr) * 2014-02-17 2016-12-28 Stanley Electric Co., Ltd. Phare de véhicule
JP2016001270A (ja) * 2014-06-12 2016-01-07 株式会社リコー 光学ユニット及び画像投影装置
US20170153002A1 (en) * 2015-11-27 2017-06-01 Valeo Vision Motor vehicle headlight lighting module and associated headlight
DE202018104105U1 (de) * 2017-07-19 2018-07-30 Ford Global Technologies, Llc Fahrzeugleuchtbaugruppe mit verbesserter Wärmeableitung
CN108873579A (zh) * 2018-06-19 2018-11-23 青岛海信激光显示股份有限公司 投影设备

Also Published As

Publication number Publication date
FR3104680B1 (fr) 2021-12-10
FR3104680A1 (fr) 2021-06-18
EP4073420A1 (fr) 2022-10-19

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