EP4253832A1 - Leuchtanordnung für kraftfahrzeuge - Google Patents

Leuchtanordnung für kraftfahrzeuge Download PDF

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Publication number
EP4253832A1
EP4253832A1 EP22165637.4A EP22165637A EP4253832A1 EP 4253832 A1 EP4253832 A1 EP 4253832A1 EP 22165637 A EP22165637 A EP 22165637A EP 4253832 A1 EP4253832 A1 EP 4253832A1
Authority
EP
European Patent Office
Prior art keywords
luminous
automotive
solid
light source
substrate
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.)
Pending
Application number
EP22165637.4A
Other languages
English (en)
French (fr)
Inventor
Juan Jose SANTAELLA HERNANDEZ
Miguel Angel CANTUDO FRANCO
Jose David ROLDAN ZAFRA
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
Priority to EP22165637.4A priority Critical patent/EP4253832A1/de
Publication of EP4253832A1 publication Critical patent/EP4253832A1/de
Pending legal-status Critical Current

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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
    • F21S43/16—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
    • 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
    • F21W2103/40—Rear fog 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
    • F21W2103/45—Reversing lights

Definitions

  • This invention belongs to the field of electronic assemblies comprised within the automotive luminous devices, intended to provide luminous functions to the vehicles.
  • Automotive lighting market can be considered one of the most competitive ones and new lighting functionalities are constantly required.
  • the same substrate is used in different luminous devices of the same vehicle when two different lighting functions are to be used in each side of the vehicle, and both functions require similar optical features.
  • both positions are provided in each of the substrates, and then, in each side, the corresponding light source is installed. This is cheap in terms of manufacturing a single model of substrate, but brings up some problems in term of optical performance, track routing, unnecessary duplication and luminous power needed to fulfil the regulations.
  • the present invention provides an alternative arrangement to provide a luminous assembly for an automotive vehicle, where the same substrate is used in each side for different lighting functions.
  • the invention provides an alternative solution for managing the needs of the light sources of an automotive luminous device by an automotive luminous arrangement comprising a first luminous device comprising a first substrate and a second luminous device comprising a second substrate, wherein
  • 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.
  • An optical element is an element that has some optical properties to receive a light beam and emit it in a certain direction and/or shape, as a person skilled in automotive lighting would construe without any additional burden.
  • Reflectors, collimators, light guides, projection lenses, etc., or the combination thereof are some examples of these optical elements which are useful for transforming the light beams emitted by the light source into an acceptable light pattern for the functionality chosen for the lighting device. All of these optical elements define a focus, which is the point where the light emitted by the light source is most effectively transmitted by the optical element.
  • the wavelength conversion layers are only in charge of providing the suitable colour for the lighting functionality, but do not provide the luminous flux necessary to fulfil the regulations.
  • the light power is provided by the light sources, not by the wavelength conversion layer.
  • the wavelength conversion layer may introduce some power losses when converting the light to a different wavelength, depending on the nature of the chosen layer.
  • the first solid-state light source is intended to contribute to a first luminous function and the second solid-state light source is intended to contribute to a second luminous function different from the first luminous function.
  • the colours may be different, the luminous functions may be different, and associated to different colours.
  • the first luminous function comprises a fog lamp function and the second luminous function comprises a reverse lamp function.
  • the first substrate and the second substrate are printed circuit boards and the arrangement of the first substrate is symmetrical with respect to the arrangement of the second substrate.
  • the substrates are also symmetrical (i.e., the left substrate is a symmetrical design with respect of the right substrate, taking a central plane extending from the front part to the rear part of the vehicle as the symmetry plane).
  • the first luminous device comprises a driver element configured to control the operation of the solid-state light source of the first automotive luminous device and the second luminous device comprises a driver element configured to control the operation of the solid-state light source of the second automotive luminous device.
  • the first and/or second wavelength conversion layers comprises quantum dots located to receive light emitted by the light sources.
  • a quantum dot is an electronic structure obtained out of a semiconductor nanocrystal, with a size such that their electrons and holes are confined in all three spatial dimensions.
  • they emit light in a particular wavelength (bandgap) when they are excited, either electrically or luminescently.
  • bandgap a particular wavelength
  • red quantum dots would be quantum dots which emit light in the red bandgap when excited
  • green quantum dots would be quantum dots which emit light in the green bandgap when excited, etc.
  • quantum dots are deposited in a nanometric layer using a thin film deposition technology. By controlling the amount and density of the quantum dots, this layer could be not visible when not excited either by an electric or by a luminescent stimulator.
  • quantum dots are an advantageous solution since they provide flexibility in the design of the automotive lighting devices, allowing new ways of designing the different functionalities of a lighting device: lighting, indicating, signalling.
  • the quantum dots are deposited on a substrate, which is located between the output surfaces of the folder and the main optical element.
  • This substrate is easy to install, or even to attach to the folder or to the optical element, since quantum dot films are easily to obtain and to handle.
  • the quantum dots are deposited on a substrate layer.
  • each automotive luminous device comprises a main transparent cover and the quantum dots are deposited on an input surface of the main transparent cover.
  • Direct deposition on the main transparent cover of the automotive luminous device is an alternative to obtain a cleaner design.
  • the substrate layer is deposited on a reflector or on a bezel.
  • the light sources are configured to emit in a blue, deep blue or ultraviolet wavelength
  • the wavelength conversion layer comprises red and green quantum dots.
  • wavelength conversion layer modifies the wavelength of this resulting beam pattern so that it complies with the automotive regulations of the specific functionality.
  • the solid-state light source of the first automotive luminous device and the solid-state light source of the second automotive luminous device are configured to emit light in the same wavelength.
  • Figure 1 shows an arrangement of a printed circuit board 90 of an automotive luminous device of an automotive luminous arrangement according to known practice.
  • This printed circuit board 90 is used, together with the symmetrical design, to provide the rear lighting devices of a vehicle.
  • this printed circuit board 90 corresponds to a lighting device which is intended to provide the luminous functions of stop lamp, direction indicator lamp, rear position lamp and reverse lamp. Hence, it has a housing 91 for the LEDs which contribute to the stop lamp function, a housing 92 for the LEDs which contribute to the direction indicator function, a housing 93 for the LEDs which contribute to the rear position lamp function and a housing 94 for the LEDs which contribute to the reverse lamp function
  • this printed circuit board also has a housing 95 intended to receive a LED for rear fog lamp. This is because the symmetrical printed circuit board, which will be used in the left device, is intended to provide the same functionalities, except for the fact that it provides the rear fog lamp instead of the reverse lamp. To save costs, both printed circuit boards, left and right, has both the reverse lamp space and the rear fog lamp space. The result is that neither of these two lamps are located in the exact focus 96 of the corresponding reflector.
  • track routing and driver elements are provided for both functionalities in both printed circuit boards. This makes the printed circuit board wider, heavier and with a worse design in terms of electro-static discharge risk.
  • Figure 2 shows the printed circuit board 2 of the right side of an automotive luminous arrangement according to the invention.
  • this right printed circuit board 2 contains the LED which cooperates with the corresponding reflector to provide the reverse lamp functionality. This LED is located on the precise focus of the corresponding reflector.
  • the left printed circuit board which is not illustrated, also comprises the corresponding driver elements and track routings, but only for those LEDs which are in fact actively contributing to perform a lighting function.
  • Figure 3 shows a scheme of an automotive luminous arrangement according to the invention.
  • This automotive luminous arrangement comprises the two rear lighting devices 1, 11 of an automotive vehicle 10. These devices have a symmetrical design: both of them have a turning indicator lamp 4, 14 and a stop lamp 5, 15. The left one 11 has a fog lamp 16 and the right one has a reverse lamp 6. The fog lamp 16 and the reverse lamp 6 are arranged in symmetrical locations.
  • Each luminous function is provided by a LED and an optical element.
  • each one is provided by a LED and a reflector.
  • the LED contributing to the fog lamp function is located on the focus of the corresponding reflector and the same happens with the reverse lamp.
  • each lighting device comprises a main transparent cover, and there is a quantum dot layer 7, 17 arranged in a specific portion of each main transparent cover.
  • This quantum dot layer contributes to provide the suitable final colour to the light projected outside the corresponding lighting device.
  • the LED of the left device which contributes to the fog lamp functionality, emits in a blue wavelength, but, due to the interposition of the quantum dot layer, the light which is finally projected outside the device has the regulatory red colour.
  • the LED of the right device which contributes to the reverse lamp functionality.
  • This LED also emits in a blue wavelength, but, due to the interposition of the corresponding quantum dot layer, the light which is finally projected outside the device has the regulatory white colour.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP22165637.4A 2022-03-30 2022-03-30 Leuchtanordnung für kraftfahrzeuge Pending EP4253832A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22165637.4A EP4253832A1 (de) 2022-03-30 2022-03-30 Leuchtanordnung für kraftfahrzeuge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22165637.4A EP4253832A1 (de) 2022-03-30 2022-03-30 Leuchtanordnung für kraftfahrzeuge

Publications (1)

Publication Number Publication Date
EP4253832A1 true EP4253832A1 (de) 2023-10-04

Family

ID=81074321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22165637.4A Pending EP4253832A1 (de) 2022-03-30 2022-03-30 Leuchtanordnung für kraftfahrzeuge

Country Status (1)

Country Link
EP (1) EP4253832A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013205836A1 (de) * 2013-04-03 2014-10-09 Osram Opto Semiconductors Gmbh Fahrzeugleuchte
DE102014203245A1 (de) * 2014-02-24 2015-08-27 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung eines Kraftfahrzeugs
DE102015202745A1 (de) * 2014-10-15 2016-04-21 Hyundai Motor Company Fahrzeugbeleuchtungsvorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013205836A1 (de) * 2013-04-03 2014-10-09 Osram Opto Semiconductors Gmbh Fahrzeugleuchte
DE102014203245A1 (de) * 2014-02-24 2015-08-27 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung eines Kraftfahrzeugs
DE102015202745A1 (de) * 2014-10-15 2016-04-21 Hyundai Motor Company Fahrzeugbeleuchtungsvorrichtung

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