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EP3716733B1 - Ensemble électronique et dispositif d'éclairage pour automobile - Google Patents

Ensemble électronique et dispositif d'éclairage pour automobile Download PDF

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Publication number
EP3716733B1
EP3716733B1 EP19382215.2A EP19382215A EP3716733B1 EP 3716733 B1 EP3716733 B1 EP 3716733B1 EP 19382215 A EP19382215 A EP 19382215A EP 3716733 B1 EP3716733 B1 EP 3716733B1
Authority
EP
European Patent Office
Prior art keywords
driver
light sources
lighting device
electronic assembly
automotive lighting
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
EP19382215.2A
Other languages
German (de)
English (en)
Other versions
EP3716733A1 (fr
Inventor
Miguel Angel CANTUDO
Manuel CALMAESTRA
Miguel-Angel Pena
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 Iluminacion SA
Original Assignee
Valeo Iluminacion SA
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 Iluminacion SA filed Critical Valeo Iluminacion SA
Priority to EP19382215.2A priority Critical patent/EP3716733B1/fr
Publication of EP3716733A1 publication Critical patent/EP3716733A1/fr
Application granted granted Critical
Publication of EP3716733B1 publication Critical patent/EP3716733B1/fr
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/18—Controlling the light source by remote control via data-bus transmission
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits

Definitions

  • This invention belongs to the field of lighting devices installed in automotive vehicles, and more specifically to the electronic assemblies used in these automotive lighting devices.
  • Lighting devices installed in automotive vehicles usually comprise light sources mounted on a printed circuit board (PCB). These light sources are usually controlled to be selectively activated, so that different presentations may be achieved, depending on the function required by the user.
  • PCB printed circuit board
  • micro-controllers in lighting devices is therefore increasing, because these dynamic functionalities are being demanded by the main automotive manufacturers.
  • these micro-controllers are expensive, and need to be programmed.
  • the invention provides an alternative solution for improving the aforementioned problem by an electronic assembly according to claim 1 and an automotive lighting device according to claim 5.
  • the invention provides an electronic assembly for an automotive lighting device, the electronic assembly comprising
  • a power unit is defined as any unit capable of drive electric loads at a constant current.
  • this element may be, e. g., a linear driver or a DC/DC converter.
  • This electronic assembly may advantageously be used in an automotive lighting device without any software programming. Hence, there is no need of updating or checking a software, and there is no need for some auxiliary elements, such as a transceiver and adapters, which were present in previous embodiments with micro-controllers. Further, since a whole group of light sources are controlled by a single output of the main driver element, more complex architectures are allowed.
  • the electronic assembly further comprises a second group of light sources electrically fed by the power input, wherein the main driver element further comprises driver low current outputs and wherein the second group of light sources are directly connected to driver low current outputs.
  • This main drivermeyelso comprises traditional low current outputs for a direct control of light sources which do not require an intermediate power step device.
  • the electronic assembly further comprises a third group of light sources electrically fed by the power input and a second power unit arranged between one driver discrete output and the third group of light sources.
  • the first power unit is a linear driver or a DC/DC converter. These elements are useful for managing the activation of high power light sources, which cannot be managed directly by the main driver element.
  • the main driver element is arranged as a current sink, wherein the light sources are electrically arranged between the power input and the main driver element.
  • the main driver element further comprises a BUS configuration memory and a measure and diagnosis units, and wherein
  • This particular arrangement of the main driver element allows a bi-directional communication with the control centre of the vehicle without any software programmed element.
  • the light sources are solid-state light sources, such as light emitting diodes (LEDs).
  • 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 life span 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 invention provides a lighting device comprising an electronic assembly according to the first inventive aspect.
  • This lighting device is particularly useful in automotive applications, for lighting functionalities where a coordinated response is required, but may be obtained without the use of an expensive programmed controller.
  • the lighting device further comprises a first optical element arranged to receive light from the plurality of light sources and to shape the light into a light pattern projected outside the lighting device.
  • 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.
  • the optical element is at least one of a light guide, a lens, a reflector or a collimator.
  • optical elements are useful to manage the light produced by the plurality of light sources and provide uniform output.
  • the lighting device is a a turning indicator, a cornering light, a fixed bending light or a daytime running lamp.
  • These lighting functionalities are typical to use a group of light sources to provide the coordinated response.
  • FIG. 1 shows a first schematic view of an electronic assembly 1 according to the invention.
  • This electronic assembly 1 comprises
  • the main driver element 4 comprises a driver input 40 arranged in direct bi-directional communication with the communication input 3 and further comprises two types of driver outputs: driver discrete outputs 41 and driver low current outputs 42.
  • Low current outputs 42 are arranged to feed two groups of low current LEDs 5, 6. Due to the fact that these group of LEDs work with low current, they may be directly managed by the main driver element 4, without the interposition of any intermediate power stage.
  • Driver discrete outputs 41 are arranged to feed two groups of high power LEDs 7, 8. However, since the main driver element 4 is not able to provide a high amount of power, intermediate power units 21, 22 are arranged between each driver discrete output 41 and each group of high power LEDs 7, 8.
  • the first intermediate power unit 21 is a linear driver and the second intermediate power unit 22 is a DC/DC converter.
  • the main driver element 4 is arranged as a current sink, because the groups of LEDs 5, 6, 7, 8 are electrically arranged between the power input 2 and the main driver element 4.
  • FIG. 2 shows a more detailed scheme of the main driver element 4 of figure 1 .
  • This main driver 4 comprises the following
  • the hardware finite-state machine 43 controls the driver outputs 41, 42, thus controlling the activation and deactivation of the groups of LEDs.
  • the BUS configuration memory 44 receives data directly from the communication input 3, so that the hardware finite state machine may act according to the information received.
  • the memory and diagnosis unit 45 is arranged to receive data from the driver outputs 41, 42 and transmit them to the hardware finite-state machine 43, so that this information is suitably transmitted to the communication input 3 and then to the control centre.
  • FIG. 3 shows a lighting device 10 comprising an electronic assembly 1 according to the invention.
  • This lighting device is a headlamp and is installed in an automotive vehicle 100.
  • This lighting device comprises a projecting lens 9 which receives the light of the plurality of LEDs (not seen) and shape it into a light pattern projected outside the lighting device 10.

Landscapes

  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Claims (8)

  1. Ensemble électronique (1) pour un dispositif d'éclairage pour automobile (10), l'ensemble électronique (1) comprenant :
    une unique entrée d'alimentation (2) ;
    une entrée de communication unique (3), destinée à fournir une communication bidirectionnelle avec un centre de contrôle ;
    un élément de commande principal (4), comprenant des entrées de commande (40) disposées en communication bidirectionnelle directe avec l'entrée de communication et comprenant en outre des sorties discrètes de commande (41) ;
    un premier groupe de sources lumineuses de haute puissance (7), alimentées électriquement par l'entrée d'alimentation unique (2),
    une première unité d'alimentation (21) placée entre l'une des sorties discrètes de commande (41) et le premier groupe de sources lumineuses de haute puissance (7),
    un deuxième groupe de sources lumineuses (5) alimentées électriquement par l'entrée d'alimentation unique (2),
    un troisième groupe de sources lumineuses de haute puissance (8) alimentées électriquement par l'entrée d'alimentation unique (2) et une deuxième unité d'alimentation (22) disposée entre une autre sortie discrète de commande (41) et le troisième groupe de sources lumineuses de haute puissance (8),
    où l'élément de commande principal (4) comprend une machine à états finis matérielle (43) configurée pour fournir une communication bidirectionnelle entre l'entrée de communication (3) et la première unité d'énergie (21),
    l'ensemble électronique (1) étant caractérisé en ce que l'élément de commande principal (4) comprend en outre des sorties de courant faible de commande (42), et le deuxième groupe de sources lumineuses (5) étant directement connectées aux sorties de courant faible de commande (42).
  2. Ensemble électronique (1) selon la revendication 1, dans lequel la première unité d'alimentation (21) est une commande linéaire ou un convertisseur DC/DC.
  3. Ensemble électronique (1) selon l'une quelconque des revendications précédentes, dans lequel l'élément de commande principal (4) comprend en outre une mémoire de configuration de BUS (44) et une unité de mesure et de diagnostic (45), et où
    la machine matérielle à états finis (43) est conçue pour contrôler les sorties discrètes de commande et les sorties de courant faible de commande (41, 42) ;
    la mémoire de configuration de BUS (44) est conçue pour recevoir des données directement depuis l'entrée de communication (3) ;
    l'unité de mémoire et de diagnostic (45) est conçue pour recevoir les données des sorties discrètes de commande et des sorties de courant faible de commande (41, 42) et pour les transmettre à la machine matérielle à états finis (43).
  4. Ensemble électronique (1) selon l'une quelconque des revendications précédentes, dans lequel les sources lumineuses sont des sources lumineuses à semiconducteur, telles que des diodes électroluminescentes ou DEL.
  5. Dispositif d'éclairage pour automobile (10) comprenant un ensemble électronique (1) selon l'une quelconque des revendications précédentes.
  6. Dispositif d'éclairage pour automobile (10) selon la revendication 5, comprenant en outre un premier élément optique (9) conçu pour recevoir la lumière provenant de la pluralité de groupes de sources lumineuses (5, 7, 8) et pour façonner la lumière en un motif lumineux projeté à l'extérieur du dispositif d'éclairage pour automobile.
  7. Dispositif d'éclairage pour automobile (10) selon la revendication 6, dans lequel le premier élément optique (9) est au moins l'un des éléments suivants : une lentille, un guide de lumière, un réflecteur ou un collimateur.
  8. Dispositif d'éclairage pour automobile (10) selon l'une quelconque des revendications 5 à 7, le dispositif d'éclairage pour automobile (10) étant un feu avant ou un feu arrière.
EP19382215.2A 2019-03-27 2019-03-27 Ensemble électronique et dispositif d'éclairage pour automobile Active EP3716733B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19382215.2A EP3716733B1 (fr) 2019-03-27 2019-03-27 Ensemble électronique et dispositif d'éclairage pour automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19382215.2A EP3716733B1 (fr) 2019-03-27 2019-03-27 Ensemble électronique et dispositif d'éclairage pour automobile

Publications (2)

Publication Number Publication Date
EP3716733A1 EP3716733A1 (fr) 2020-09-30
EP3716733B1 true EP3716733B1 (fr) 2025-01-15

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ID=66175369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19382215.2A Active EP3716733B1 (fr) 2019-03-27 2019-03-27 Ensemble électronique et dispositif d'éclairage pour automobile

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4203620A1 (fr) * 2021-12-26 2023-06-28 Valeo Vision Ensemble électronique pour un dispositif lumineux d'automobile et dispositif lumineux d'automobile

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050111231A1 (en) * 2003-11-24 2005-05-26 Crodian James R. Light controller
US20110285291A1 (en) * 2009-11-17 2011-11-24 Automotive Lighting Reutlingen Gmbh Control unit for controlling an illumination device for a motor vehicle as well as an illumination device for a motor vehicle with such a control unit
US20150377437A1 (en) * 2013-02-13 2015-12-31 Continental Automotive Gmbh Light source and method for producing the light source
US20170079120A1 (en) * 2015-09-14 2017-03-16 Valeo Vision Distributed electric lighting architecture for motor vehicle
US20170188419A1 (en) * 2015-12-23 2017-06-29 Stmicroelectronics S.R.L Integrated Device and Method for Driving Lighting Loads with a Brightness Compensation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7129652B2 (en) 2004-03-26 2006-10-31 Texas Instruments Incorporated System and method for driving a plurality of loads
US9763303B2 (en) * 2015-05-15 2017-09-12 Lutron Electronics Co., Inc. Keypad interface for programming a load control system
FR3048392B1 (fr) * 2016-03-02 2019-04-05 Valeo Vision Projecteur anti-eblouissement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050111231A1 (en) * 2003-11-24 2005-05-26 Crodian James R. Light controller
US20110285291A1 (en) * 2009-11-17 2011-11-24 Automotive Lighting Reutlingen Gmbh Control unit for controlling an illumination device for a motor vehicle as well as an illumination device for a motor vehicle with such a control unit
US20150377437A1 (en) * 2013-02-13 2015-12-31 Continental Automotive Gmbh Light source and method for producing the light source
US20170079120A1 (en) * 2015-09-14 2017-03-16 Valeo Vision Distributed electric lighting architecture for motor vehicle
US20170188419A1 (en) * 2015-12-23 2017-06-29 Stmicroelectronics S.R.L Integrated Device and Method for Driving Lighting Loads with a Brightness Compensation

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Publication number Publication date
EP3716733A1 (fr) 2020-09-30

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