WO2023094676A1 - Dispositif lumineux d'automobile - Google Patents

Dispositif lumineux d'automobile Download PDF

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Publication number
WO2023094676A1
WO2023094676A1 PCT/EP2022/083550 EP2022083550W WO2023094676A1 WO 2023094676 A1 WO2023094676 A1 WO 2023094676A1 EP 2022083550 W EP2022083550 W EP 2022083550W WO 2023094676 A1 WO2023094676 A1 WO 2023094676A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric contact
substrate
contact zone
luminous device
driver
Prior art date
Application number
PCT/EP2022/083550
Other languages
English (en)
Inventor
Miguel Angel CANTUDO FRANCO
Jose David ROLDAN ZAFRA
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
Publication of WO2023094676A1 publication Critical patent/WO2023094676A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/30—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating rear of vehicle, e.g. by means of reflecting surfaces
    • B60Q1/302—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating rear of vehicle, e.g. by means of reflecting surfaces mounted in the vicinity, e.g. in the middle, of a rear window
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/2607—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic comprising at least two indicating lamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/34—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction
    • B60Q1/38—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction using immovably-mounted light sources, e.g. fixed flashing lamps
    • B60Q1/381—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction using immovably-mounted light sources, e.g. fixed flashing lamps with several light sources activated in sequence, e.g. to create a sweep effect
    • 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
    • F21S43/10—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
    • F21S43/15—Strips of light sources
    • 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
    • F21S43/19—Attachment of light sources or lamp holders
    • F21S43/195—Details of lamp holders, terminals or connectors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/36—Assembling printed circuits with other printed circuits
    • H05K3/368—Assembling printed circuits with other printed circuits parallel to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/30—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating rear of vehicle, e.g. by means of reflecting surfaces
    • B60Q1/304—Adaptations of signalling devices having a part on the vehicle body and another on the boot door
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2900/00—Features of lamps not covered by other groups in B60Q
    • B60Q2900/40—Several lamps activated in sequence, e.g. sweep effect, progressive activation
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/141—One or more single auxiliary printed circuits mounted on a main printed circuit, e.g. modules, adapters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10106—Light emitting diode [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10431—Details of mounted components
    • H05K2201/10439—Position of a single component
    • H05K2201/10446—Mounted on an edge
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/341—Surface mounted components
    • H05K3/3431—Leadless components
    • H05K3/3442—Leadless components having edge contacts, e.g. leadless chip capacitors, chip carriers

Definitions

  • This invention belongs to the field of the optical solutions for projecting light emitted by light sources of automotive luminous device outside said luminous devices.
  • Automotive lighting market can be considered one of the most competitive ones and new lighting functions are constantly required.
  • the arrangement of more than one substrate may be advisable, since a high amount of controlled light sources is needed, or because of size or geometry.
  • larger substrates are usually more expensive than the equivalent combination of shorter ones.
  • electrical connection and mechanical continuity of two adjacent substrates issues some problems that need to be solved.
  • the present invention provides a solution for this problem by means of an automotive luminous device for a signalling and/or for a lighting function, the automotive luminous device comprising
  • a two-layer printed circuit board comprising one layer at each side of the board, is an advantageous embodiment for the first and second substrate, since they are less expensive than other boards comprising a more complex architecture.
  • the third substrate comprises at least four layers.
  • This type of substrates are used when a powerful driver is used to control the light sources.
  • the driver is configured to control the light source arrays so as to display an animated lighting pattern.
  • a driver which is installed in a four-layer substrate is able to create complex patterns, such as animations, in the controlled light sources.
  • Sequential animations such as a running light which runs along the length of the rear part of the vehicle with sweeping motion, is an example of pattern to which this invention may be applied.
  • the light sources are intended to contribute to two different regulatory-lighting functions, such as position light and turning indicator or such as daytime running light and turning indicator.
  • regulatory-light functions are especially indicated for the present invention.
  • Current car manufacturers usually design automotive rear luminous functions with an idea of coast-to-coast lighting or signalling. If these luminous functions are intended to be provided with animation or complex patterns, this is only possible with a big amount of light sources and a complex control management.
  • the regulatory-lighting functions are defined and regulated by national or international associations, such as, e.g., the United Nations Economic Commission for Europe (UNECE), which create some standards that should be met by the car manufacturers.
  • UNECE United Nations Economic Commission for Europe
  • the automotive luminous device further comprises
  • the present invention may be used with more than two main substrates without any major problem.
  • a coast-to-coast function may be a Position Light or a Daytime Running Lamp extending across the front of the vehicle.
  • a position light across the rear of the vehicle Said functions are controlled by a driver, which is usually located under the corresponding lamp.
  • the automotive luminous device further comprises
  • An auxiliary arrangement is useful for extending the architecture to other parts of the vehicle, which are in contact with the main arrangement.
  • the electric contacts are soldered. In a preferred embodiment, the electric contacts are soldered in a surface mounting process.
  • SMD Surface mounted devices
  • the driver is a DC/DC driver which is configured to manage a maximum current value of more than 0.5 A, and particularly comprised between 2 and 3 A.
  • each substrate is a printed circuit board, and comprises more than 50 light emitting diodes.
  • the light source arrays are intended to provide a way of displaying a lighting pattern.
  • the car manufacturers design complex animated patterns, which require a big amount of individual light sources to be achieved.
  • a high amount of LEDs is advantageous since it enables the use of complex animation patterns.
  • the invention is also adapted to work with a far lower number of LEDs, such as 5 LEDs.
  • the automotive luminous device further comprises a wire harness, which provides electric supply to the driver.
  • a long wire harness connected to the third substrate is enough to provide electric supply to the whole set of light sources.
  • electromagnetic issues are reduced by having a single point of electric arrival.
  • shielding is reduced or not necessary, thus reducing the manufacturing cost and improving the security of the device.
  • the automotive luminous device further comprises an optical part, configured to project the light emitted by the light source arrays to the exterior of the automotive luminous device.
  • the light source arrays comprise 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 light source array comprises from 1 to 100 rows and/or from 1 to 100 columns.
  • a matrix array is a typical example for these light modules.
  • the rows may be grouped in projecting distance ranges and each column of each group represent an angle interval. This angle value depends on the resolution of the matrix arrangement, which is typically comprised between 0.01o per column and 0.5o per column. As a consequence, many light sources may be managed at the same time.
  • the arrays may have any shape, since the shape is defined by the car manufacturer, and this invention may be embodied in a great amount of shapes. Further, the same light array there may be light sources with different colours (some amber light sources and some white light sources, for example, or some amber light sources and some red light sources). The car manufacturer and the current light regulation may recommend the use of a different option.
  • the substrates are preferably rigid substrates, for instance FR4 substrates or IMS substrates, as opposed to flexible PCBs known in the art. Such substrates are less costly to produce and assemble. In particular, it is preferred that the substrate is of the FR4, FR5 or FR6 types, which are less costly than IMS.
  • top surface area of a given substrate it is meant the surface area of the substrate in a plane section along a top layer of the substrate, usually a layer onto which light sources are mounted.
  • the third substrate has a higher number of layers. Said higher number of layers allows for complex routing, required for supplying power to large arrays of LEDs, while keeping a low bulk. Meanwhile, in the first and second substrates, a lower number of layers is needed, so that the cost of these larger substrates is kept down.
  • the substrates assembly is thus particularly well suited for use in a lighting device covering a large portion of the width of the vehicle, in particular in a coast-to-coast lighting device wherein the lighting device extends along the whole width of the vehicle, or almost the whole width.
  • the lighting module further comprises an optical element, such as a light filter or a collimator, adapted to receive the light emitted by the solid-state light source and project it outside the lighting module.
  • an optical element such as a light filter or a collimator
  • the invention provides an automotive vehicle comprising a trunk door and comprising an automotive luminous device according to the first inventive aspect installed in the trunk door.
  • FIG. 1 shows some parts of a first embodiment of a luminous device according to the invention.
  • FIG. 1 shows an embodiment of a luminous device according to the invention, installed in an automotive vehicle.
  • FIG. 1 shows some parts of a first embodiment of a luminous device according to the invention.
  • the device comprises a first printed circuit board 1.
  • This printed circuit board comprises two layers, each layer comprising an electronic circuit. This type of printed circuit boards are common in automotive manufacturing.
  • the upper layer comprises a first electric contract zone 6 and the printed circuit board assembly comprises more than 100 LEDs 4.
  • the device also comprises a second printed circuit board 2, similar to the first one.
  • the upper layer comprises a second electric contact zone 7 and the printed circuit board comprises more than 100 LEDs 5.
  • This printed circuit board is a four-layer PCB, and comprises a driver 8, which is intended to control the operation of the LEDs 4, 5. To do so, this third printed circuit board 3 is electrically connected to the first printed circuit board 1 and to the second printed circuit board 2. To establish this contact, the third printed circuit board 3 has a first pad 9 which is connected to the first electric contact zone 6 by surface mounting and a second pad 10 which is connected to the second electric contact zone 7 by surface mounting.
  • the surface mounting process consists of depositing a solder paste 11 between the pads to be connected, and then applying heat to melt this solder paste 11 and create the electric contact. This is a quick and unexpensive process, and saves time and cost compared to other joints, like ribbon mounting.
  • the lighting functionality is performed by three main printed circuit boards, thus adding an additional base printed circuit board 17, which comprises a plurality of LEDs, and an additional driver printed circuit board 12, which is a four-layer printed circuit board which comprises a secondary driver 13.
  • This embodiment is particularly advantageous when the animation needs more than one driver, either due to a high number of involved LEDs or due to a high current value or a complex pattern.
  • the arrangement of may be extended to more than two printed circuit boards, coupled two by two by some four-layer printed circuit boards comprising a driver, as seen in this .
  • the device further comprises two auxiliary printed circuit boards 14, one at each side of the main arrangement shown in Figures 1 and 2.
  • auxiliary printed circuit boards 14 are intended to provide the same luminous functionality as the main arrangement, but in different locations of the automotive vehicle.
  • each auxiliary printed circuit board 14 there is an auxiliary driver printed circuit board 15, which comprises a secondary driver 16, which is configured to control the light sources of the auxiliary printed circuit board 14.
  • This arrangement is complementary to the ones shown in Figures 1 and 2, and are useful when the light functions are to be achieved on the vehicle. However, this arrangement may perform, on its own, a regulatory-lighting function, such as turn indicator.
  • FIG. 1 shows an embodiment of a luminous device 20 according to the invention, installed in an automotive vehicle 100.
  • both arrangements are observed: a primary arrangement “coast-to-coast” of a tail and stop luminous functionality and a secondary arrangement, which extends in the lateral side of the vehicle. These two arrangements are combined to provide a suitable presentation of the tail functionality.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Production Of Multi-Layered Print Wiring Board (AREA)

Abstract

L'invention concerne un dispositif lumineux d'automobile comprenant un premier substrat (1) comprenant deux couches, au moins une couche comprenant un circuit électronique monté avec un premier réseau de sources de lumière (4) et au moins une couche comprenant une première zone de contact électrique (6) ; un deuxième substrat (2) comprenant deux couches, au moins une couche comprenant un circuit électronique monté avec un second réseau de sources de lumière (5) et au moins une couche comprenant une deuxième zone de contact électrique (7) ; un troisième substrat (3) comprenant plus de deux couches, chaque couche comprenant un circuit électronique, l'un des circuits électroniques du troisième substrat comprenant un circuit d'attaque (8), les couches comprenant une zone de contact électrique (9) en contact électrique avec la première zone de contact électrique (6) et une autre zone de contact électrique (10) en contact électrique avec la seconde zone de contact électrique (7) ; le circuit d'attaque (8) commandant le fonctionnement des premier et second réseaux de sources de lumière (4, 5).
PCT/EP2022/083550 2021-11-28 2022-11-28 Dispositif lumineux d'automobile WO2023094676A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FRFR2112617 2021-11-28
FR2112617A FR3129709B3 (fr) 2021-11-28 2021-11-28 Dispositif lumineux automobile

Publications (1)

Publication Number Publication Date
WO2023094676A1 true WO2023094676A1 (fr) 2023-06-01

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Application Number Title Priority Date Filing Date
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FR (1) FR3129709B3 (fr)
WO (1) WO2023094676A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050036327A1 (en) * 2003-07-30 2005-02-17 Jet Patel Dynamic vehicle accent lighting system
WO2007117854A2 (fr) * 2006-03-31 2007-10-18 Federal Signal Corporation Barre lumineuse et procédé de fabrication
US20140085072A1 (en) * 2012-09-24 2014-03-27 Checkers Industrial Products, Llc Led strobe light
DE102016206275A1 (de) * 2016-04-14 2017-10-19 Volkswagen Aktiengesellschaft Verfahren zum Betreiben wenigstens einer Beleuchtungsvorrichtung eines stillstehenden Kraftfahrzeugs
DE102018215951A1 (de) * 2018-09-19 2020-03-19 Osram Gmbh Lichtemittierende vorrichtung und verfahren zum herstellen derselben

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050036327A1 (en) * 2003-07-30 2005-02-17 Jet Patel Dynamic vehicle accent lighting system
WO2007117854A2 (fr) * 2006-03-31 2007-10-18 Federal Signal Corporation Barre lumineuse et procédé de fabrication
US20140085072A1 (en) * 2012-09-24 2014-03-27 Checkers Industrial Products, Llc Led strobe light
DE102016206275A1 (de) * 2016-04-14 2017-10-19 Volkswagen Aktiengesellschaft Verfahren zum Betreiben wenigstens einer Beleuchtungsvorrichtung eines stillstehenden Kraftfahrzeugs
DE102018215951A1 (de) * 2018-09-19 2020-03-19 Osram Gmbh Lichtemittierende vorrichtung und verfahren zum herstellen derselben

Also Published As

Publication number Publication date
FR3129709B3 (fr) 2023-11-17
FR3129709A3 (fr) 2023-06-02

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