EP3716733A1 - 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
EP3716733A1
EP3716733A1 EP19382215.2A EP19382215A EP3716733A1 EP 3716733 A1 EP3716733 A1 EP 3716733A1 EP 19382215 A EP19382215 A EP 19382215A EP 3716733 A1 EP3716733 A1 EP 3716733A1
Authority
EP
European Patent Office
Prior art keywords
light sources
electronic assembly
driver
lighting device
light
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
EP19382215.2A
Other languages
German (de)
English (en)
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/EP3716733A1/fr
Publication of EP3716733A1 publication Critical patent/EP3716733A1/fr
Pending legal-status Critical Current

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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 8.
  • Preferred embodiments of the invention are defined in dependent claims.
  • 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 driver may also comprise 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.
  • 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)
EP19382215.2A 2019-03-27 2019-03-27 Ensemble électronique et dispositif d'éclairage pour automobile Pending EP3716733A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19382215.2A EP3716733A1 (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 EP3716733A1 (fr) 2019-03-27 2019-03-27 Ensemble électronique et dispositif d'éclairage pour automobile

Publications (1)

Publication Number Publication Date
EP3716733A1 true EP3716733A1 (fr) 2020-09-30

Family

ID=66175369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19382215.2A Pending EP3716733A1 (fr) 2019-03-27 2019-03-27 Ensemble électronique et dispositif d'éclairage pour automobile

Country Status (1)

Country Link
EP (1) EP3716733A1 (fr)

Cited By (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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050212459A1 (en) 2004-03-26 2005-09-29 Patel Sanmukh M System and method for driving a plurality of loads
US20160338167A1 (en) * 2015-05-15 2016-11-17 Lutron Electronics Co., Inc. Keypad interface for programming a load control system
US20170253172A1 (en) * 2016-03-02 2017-09-07 Valeo Vision Anti-dazzle headlamp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050212459A1 (en) 2004-03-26 2005-09-29 Patel Sanmukh M System and method for driving a plurality of loads
US20160338167A1 (en) * 2015-05-15 2016-11-17 Lutron Electronics Co., Inc. Keypad interface for programming a load control system
US20170253172A1 (en) * 2016-03-02 2017-09-07 Valeo Vision Anti-dazzle headlamp

Cited By (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

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