WO2023232706A1 - Dispositif lumineux avec un module lumineux agence devant un module d´eclairage - Google Patents
Dispositif lumineux avec un module lumineux agence devant un module d´eclairage Download PDFInfo
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- WO2023232706A1 WO2023232706A1 PCT/EP2023/064249 EP2023064249W WO2023232706A1 WO 2023232706 A1 WO2023232706 A1 WO 2023232706A1 EP 2023064249 W EP2023064249 W EP 2023064249W WO 2023232706 A1 WO2023232706 A1 WO 2023232706A1
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- WO
- WIPO (PCT)
- Prior art keywords
- light
- module
- lighting
- pattern
- guide
- 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.)
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
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- 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
- F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
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- 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
- B60Q1/0029—Spatial arrangement
- B60Q1/0041—Spatial arrangement of several lamps in relation 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
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
- B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
- B60Q1/1415—Dimming circuits
-
- 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]
- F21S43/145—Surface emitters, e.g. organic light emitting diodes [OLED]
-
- 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
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
- F21S43/236—Light guides characterised by the shape of the light guide
- F21S43/239—Light guides characterised by the shape of the light guide plate-shaped
-
- 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
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
- F21S43/242—Light guides characterised by the emission area
- F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
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- 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
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
- F21W2102/10—Arrangement or contour of the emitted light
- F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
-
- 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
- F21W2103/55—Daytime running lights [DRL]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/20—Electroluminescent [EL] light sources
Definitions
- the present invention relates to the field of light devices comprising one or more lighting modules, in particular for motor vehicle headlights.
- the invention applies in particular, but not exclusively, to the external appearance of such headlights, in particular when the vehicle is driven during the day.
- Light devices such as headlights generally have a plurality of light functions performed by one or more modules. We know in particular the following light functions:
- HB a high beam type lighting function, or HB, for “High Beam” in English, which can be carried out by the same lighting module as that in charge of the LB function, or by a separate module;
- DRL Daytime Running Light
- signature the external appearance of the lighting device, which depends on the respective arrangement of the light modules, their number and their respective shapes.
- the signature is particularly observable when all of the modules of the light device are activated.
- Such a signature may be perceived differently when driving at night and when driving during the day. Indeed, at night, the module(s) which perform the lighting functions such as LB and HB are visible to an external observer. A complete signature is thus obtained. However, during the day, these lighting functions are generally not activated, which induces one or more black zones in the signature of the lighting device. The signature of the light device is incomplete and different from the signature at night for an observer located outside the vehicle.
- the present invention improves the situation.
- a first aspect of the invention relates to a lighting device for a motor vehicle, comprising at least one lighting module capable of projecting light rays to perform a lighting function, a light module and a control element.
- the light module is at least partially transparent and is arranged so as to be crossed by light rays emitted by the lighting module and the control element is capable of activating the light module when the at least one lighting module is deactivated .
- a light module activated when at least one lighting module is deactivated makes it possible to harmonize the signature of the light device between night and day driving situations.
- the light module being at least partially transparent, it allows the lighting function to be carried out by the lighting module when the light module is not activated.
- said at least one lighting module may be able to perform a low beam lighting function and/or a high beam lighting function.
- Such functions are generally deactivated during the day, and the modules carrying them out are precisely capable of creating dark zones in the signature of the light device.
- the space associated with the performance of these functions is limited in the lighting device.
- the light device may comprise a first lighting module capable of performing a low beam lighting function and a second lighting module capable of performing a high beam lighting function , the light module being arranged so as to be crossed by the light rays coming from the first lighting module and/or the second lighting module.
- the light device may comprise two lighting modules, and the light module may be capable of hiding the dark areas associated with at least one of these two lighting modules.
- a single light module can also be shared alongside two lighting modules, which limits the costs and the size of the light device according to the invention.
- the light module can be capable of emitting light rays according to at least one light pattern, the light module being arranged so that said at least one light pattern faces an optical surface of at least one lighting module.
- the light pattern can superimpose the optical surface of the at least one lighting module.
- the light pattern can have the same shape as the optical surface of the at least one lighting module, which makes it possible to harmonize the signature of the light device with great precision.
- the light module can be arranged inside a lens of an optical system of the lighting module.
- the light module is thus mechanically protected and is not exposed to the outside of the light device.
- the light module can be arranged on an external glass of the light device.
- the light module can comprise:
- a light guide comprising an at least partially transparent guide sheet, the guide sheet being capable of receiving light rays through at least one light injection edge of said guide sheet and of returning the light rays in one direction substantially normal locally to a surface of the guide sheet according to at least one light pattern, the light guide further comprising at least one light injection element capable of receiving light and distributing the light in the guide sheet ;
- At least one light source capable of injecting light into said at least one light injection element.
- the control element may be able to activate said at least one light source when the lighting module is deactivated.
- the light module is of the type with a guide sheet, for example with a flexible guide sheet, which is inexpensive, easy to manufacture, and easy to integrate.
- a solution is not very sensitive to environmental conditions such as humidity and temperature.
- the guide sheet is capable of being curved without being damaged.
- a guide sheet can be placed on a non-planar support and adopt its shape without being damaged.
- the flexible guide sheet can be curved according to the curvature of an optical projection surface of the lighting module.
- the flexible guide sheet can be arranged convexly with a radius of curvature directed towards the interior of the vehicle automobile when the lighting device is mounted in or on said motor vehicle.
- the lighting device can comprise a first lighting module capable of performing a low beam lighting function and a second lighting module capable of performing a low beam lighting function.
- the light module can comprise a single light guide, a first pattern being engraved in a first part of the guide sheet of the single light guide and a second pattern being engraved in a second part of the sheet of guiding the single light guide, the first pattern can be arranged facing a first optical projection surface of the first lighting module and the second pattern can be arranged facing a second optical projection surface of the second lighting module.
- the bulk and cost associated with the light module is reduced, with a single injection element and a source to illuminate two patterns facing two separate lighting modules.
- the single light guide may comprise the guide sheet, a first light injection element and a second light injection element, the first light injection element may be arranged so as to inject light.
- the light in a first section of the light injection section of the guide sheet and the second light injection element can be arranged so as to inject light into a second section of the light injection section the guide sheet, the first part of the guide sheet being located opposite the first section of the light injection slice and the second part of the guide sheet being located opposite the second section of the slice d injection of light.
- the light module may comprise an at least partially transparent substrate, an emissive layer comprising an electroluminescent material between a first electrode and a second electrode, the first electrode being between the transparent substrate and the emissive layer, the control element may be able to control a voltage source capable of applying a voltage between the first electrode and the second electrode, so that the emissive layer emits light rays towards the outside of the module luminous.
- the light module can be an at least partially transparent screen which is only activated when the lighting module is deactivated.
- the bulk associated with the lighting device is thus reduced compared to a solution with a light guide.
- the first electrode, the second electrode and the emissive layer can each have a thickness of less than 10 micrometers, in particular less than 1 micrometer.
- Such thicknesses allow high transparency of the light module, which makes it possible to carry out the lighting function by the lighting module, while reducing the bulk associated with the light device.
- Such thicknesses can in particular be obtained by a process of deposition of thin atomic layers.
- the light module may further comprise a first transport layer and a second transport layer, the first transport layer being included between the emissive layer and the first electrode and the second transport layer being included between the emissive layer and the second electrode.
- the light module may further comprise an at least partially transparent protective layer, for example made of glass, the second electrode being included between the protective layer and the emissive layer.
- the light module is mechanically protected.
- the electroluminescent material may be an inorganic electroluminescent material, in particular an inorganic electroluminescent material comprising zinc sulphide doped with manganese.
- Such a material has better tolerance to temperature variations than an organic material.
- Manganese-doped zinc sulphide produces yellow or green light, and operates in a temperature range between -100°C and +105°C.
- the electroluminescent material may be an organic electroluminescent material, in particular an organic electroluminescent polymer.
- the light module can thus be an organic light-emitting diode, called OLED, for “Organic Light Emitting Diode” in English, or a pixelated OLED screen.
- OLED organic light-emitting diode
- the light device may further comprise a signaling module capable of performing a daytime signaling function, in which the control unit is capable of controlling the signaling module, and, upon activation of day signaling function, the control unit can be configured to activate the light module. Indeed, such a signaling function being activated during the day, the light module is then activated when the lighting functions are deactivated. The harmonization of the signature of the lighting device is thus facilitated.
- FIG 1 a illustrates a light guide of a light module of a lighting device for a motor vehicle, according to a first non-limiting embodiment of the invention
- FIG 1 b illustrates a front view of a light module of a lighting device for a motor vehicle, according to the first non-limiting embodiment of the invention
- FIG 1 c illustrates a three-dimensional view of a light module of a lighting device for a motor vehicle, according to the first non-limiting embodiment of the invention
- FIG 2 illustrates a light module of a lighting device for a motor vehicle, according to second and third non-limiting embodiments of the invention
- FIG 3 illustrates a lighting device for a motor vehicle, according to non-limiting embodiments of the invention
- FIG 4 illustrates a first example of a light module of a lighting device for a motor vehicle, according to the first non-limiting embodiment of the invention
- FIG 5 illustrates a second example of a light module of a lighting device for a motor vehicle, according to the first non-limiting embodiment of the invention
- FIG 6 illustrates a third example of a light module of a light device for a motor vehicle, according to the first non-limiting embodiment of the invention.
- the description focuses on the characteristics which distinguish the light device and the light module from those known in the state of the art.
- Figure 1 a presents a light guide 105 of a light module of a lighting device for a motor vehicle, according to a first non-limiting embodiment of the invention.
- the light guide 105 comprises a guide sheet 110 capable of receiving light rays through a light injection edge 114 and of returning the light rays in a direction Z substantially normal to a surface of the guide sheet which extends thus in an X-Y plane in Figure 1 a.
- guide sheet we mean an optical guide element of which one of the dimensions is much smaller than the other two dimensions in space, for example lower by one or more orders of magnitude.
- a guide sheet whose thickness along the Z axis is less than at least two orders of magnitude than its dimensions along the X-Y plane in which the guide sheet 110 extends.
- Such a guide sheet can advantageously be flexible, which facilitates its integration into a lighting device.
- a flexible guide sheet 110 is considered for illustration purposes.
- the guide sheet 110 may comprise a film 111, which may be advantageously flexible, at its heart comprising at least one light injection slice 114, being able to guide the light rays in an overall direction X, and comprising a set of microstructures 113 capable of returning the light rays guided in the film 111 outside the guide sheet 110, in particular in one or more directions substantially along the Z axis.
- a film 111 which may be advantageously flexible, at its heart comprising at least one light injection slice 114, being able to guide the light rays in an overall direction X, and comprising a set of microstructures 113 capable of returning the light rays guided in the film 111 outside the guide sheet 110, in particular in one or more directions substantially along the Z axis.
- the film 111 may be a substrate film made of polycarbonate, PC, polymethyl methacrylate, PMMA, thermoplastic polyurethane, TUP, or polyethylene terephthalate, PET.
- the film 111 can have a thickness, i.e. a dimension along the Z axis, of between 12 and 1000 micrometers. More precisely, the thickness of the film 111 can be between 50 and 1000 micrometers, for example between 200 and 500 micrometers. Alternatively, it is the guide sheet 110 which has a thickness of between 200 and 1000 micrometers.
- the aforementioned materials associated with a low thickness as described above, make it possible to obtain a flexible film 111.
- Other materials can be provided for the composition of the flexible film 111.
- a fine coating of microstructures 113 can be attached to one of the faces of the film 111, or be integrated into the film 111.
- the coating of microstructures 113 can in particular have a thickness along the Z axis of less than 20 micrometers.
- Such microstructures 113 may have a general bump shape, on which the light rays are reflected in a direction substantially along the Z axis. Such microstructures 113 may be capable of causing the light rays emerging from the film 111 to form a light pattern. .
- the microstructures 113 can be etched by ultraviolet printing, so as to reflect the light rays injected into the injection slice 114 through the surface of the film 111 according to the desired pattern.
- the microstructures can be distributed to form a light pattern of a given shape with homogeneous light over the entire light pattern thus formed.
- microstructures 113 we mean structures, or irregularities of the film 111, the dimensions of which are less than a few micrometers. Microstructures thus also cover nanometric structures. Such sizes of microstructures 113 ensure high transparency of the film 111. In particular, a transparency of the order of 97% can be obtained in practice by the use of microstructures 113.
- the light module according to the first embodiment of the invention, comprising the light guide 105 is at least partially transparent, that is to say it allows at least some of the light rays which reach the guide sheet to pass through.
- the light module may have a transparency greater than 50%, preferably greater than 70%, or even greater than 90%.
- the microstructures 113 can be distributed along the axis an injection element 120 of the light guide 105.
- Such a distribution advantageously makes it possible to ensure a homogeneous distribution along the X axis of the light intensity of the pattern emitted by the guide sheet 110.
- the guide sheet 110 may further comprise one or two optional protective layers 112.1 and 112.2, which make it possible to mechanically protect the film 111.
- at least one of the protective layers 112.1 and 112.2 may include an anti-UV treatment, making it possible to protect the film 111 against UV rays, once the microstructures 113 have been etched. Without such UV protection, the pattern projected by the guide sheet 110 is likely to degrade over time, particularly when exposed to the sun's rays.
- the film 111 and the protective layers 112.1 and 112.2 are shown spaced apart in Figure 1a, for illustration purposes only. It will be understood, however, that the protective layers 112.1 and 112.2 can be attached to the film 111, in particular by lamination.
- the guide sheet 110 can be flexible, it is not necessarily included in a plane but can be curved, depending on the position in which it is placed and the mechanical stresses applied to it.
- the light guide 105 illustrated in Figure 1 a also comprises a light injection element 120, comprising a set of injection layers described with reference to Figures 1 b and 1 c, the light injection element 120 being able to distribute the light in the guide sheet 110 at different positions along the Y axis, along the light injection edge 114.
- the light is injected, at each position along the Y axis, in one direction substantially parallel to the X axis.
- the light injection element 120 comprises an entrance surface 121 of rectangular or square section in Figure 1 a. However, the light injection element 120 may have an entrance surface having a different shaped section.
- the light injection element 120 is shown with an exit surface 122 extending in the direction Y and placed opposite the light injection edge 114. It will be understood on reading the description of Figures 1 b and 1 c that the exit surface 122 and the light injection edge 114 are preferably merged, the film 111 and the set of injection layers forming one and the same part.
- the entrance surface 121 is able to receive light rays from a light source external to the light guide 105 and not shown in Figure 1a.
- the light injection element 120 is able to guide the light longitudinally along the Y axis by distributing it on the exit surface 122. The distribution of light by the exit surface 122 will be better understood in the light of the description Figures 1b and 1c.
- FIG. 1 b shows a light module 100 of a light device according to the first embodiment of the invention.
- the light module 100 comprises a light guide 105 with an injection element 120 and a guide sheet 110, and a light source 130.
- the injection element 120 can comprise a plurality of injection layers 123.1, 123.2 and 123.3, capable of receiving light from the source 130 via the entry surface 121 and of guiding the light to distinct sets 124.1, 124.2 and 124.3 of positions along the Y axis.
- the injection layers 123.1, 123.2 and 123.3 can be in the same material and have the same thickness as the film 111 of the guide layer 110.
- the light guide 105 can be obtained by a roll to roll manufacturing procedure, or R2R for "Roll To Roll” in English, during which the film 111 and the injection layers 123.1, 123.2 and 123.3 are obtained from the same roll of film, which can be flexible, the injection layers 123.1, 123.2 and 123.3 being cut at different positions in Y, in a cutting direction substantially parallel to the direction X.
- the injection layers 123.1, 123.2 and 123.3 thus obtained are preferably flexible and can be folded as shown in Figure 1c.
- Each injection ply 123.1, 123.2 and 123.3 can be cut according to respective lengths so that once folded, its end forms with the ends of the other injection ply the injection surface 121, as illustrated in the figure 1 c.
- An injection element 120 with three injection layers 123.1, 123.2 and 123.3 has been shown in Figures 1 b and 1 c, for illustration purposes only.
- the injection element 120 may, however, comprise any set of injection layers comprising at least two injection layers.
- the light source 130 may be capable of generating light in a range of wavelengths. Such an interval can be centered around a visible color, in order to generate colored light, for example blue, red or green. Alternatively, the light source 130 may emit light rays over the entire range of wavelengths visible to the human eye, so as to generate white light. A very restricted wavelength range can be produced by a laser-type light source 130.
- the light source 130 can be controlled by a control element not shown in Figures 1 b and 1 c, but described later with reference to Figures 3 to 6.
- the light source 130 is not arranged directly facing the entrance surface 121 of the injection element 120, but the light module 100 according to the first embodiment further comprises an optical fiber placed between the source 130 and the injection element 120, which makes it possible to offset the source 130 relative to the light guide 105.
- the injection element 120 presented thus makes it possible to inject light at different longitudinal positions along the Y axis of the light injection slice 114.
- Each longitudinal position of the injection slice 114 can correspond to a guide line of the film 111, capable of guiding the light along the axis X along such a guide line.
- Such an association of a light guide 105 comprising a guide sheet 110 and an injection element 120, and a source 130 thus makes it possible to display a pattern by emitting light mainly in the Z direction, by a surface at least partially transparent and with good surface homogeneity.
- the guide sheet 110 is flexible, the integration of the light module 100 into equipment is facilitated.
- such a light module 100 makes it possible to emit light with a brightness of between 100 and 1000 Candelas per square meter, with a light extraction efficiency which can vary between 25% and 80%. .
- pattern we mean any distribution or predefined spatial distribution of the light intensity emitted by the light module 100. In particular, we are referring here to a two-dimensional or one-dimensional pattern.
- a pattern can thus include a homogeneous distribution of light over the entire light module.
- the pattern can also be a two-dimensional shape or symbol obtained by contrast between the light intensities of different positions in the X-Y plane of the guide sheet 110.
- the pattern can also include several shapes or symbols.
- a light guide 105 comprising a guide sheet, such as the guide sheet 110 illustrated in Figure 1 a capable of returning light in at least one light pattern, and at least one light injection element such as the injection element 120 described with reference to Figures 1 a, 1 b and 1 c; And - at least one light source such as the light source 130 previously described with reference to Figures 1 b and 1c, capable of injecting light into said at least one injection element.
- Figure 2 illustrates a light module 200 of a lighting device for a vehicle, according to second and third non-limiting embodiments of the invention.
- the light module 200 is a screen activated by the application of a potential difference to an emissive layer composed of an electroluminescent material.
- the light module 200 is also at least partially transparent, thanks in particular to the properties of the layers which compose it and which are described in the following.
- the second and third embodiments differ mainly in the electroluminescent emissive layer that is used.
- the emissive layer is formed from an electroluminescent inorganic phosphor, while in the third embodiment the emissive layer is formed from an electroluminescent organic material.
- the light module 200 comprises:
- a substrate 201 of an at least partially transparent material for example glass.
- a material can be chosen because it allows high transparency
- a first electrode 203 for example a cathode, connected to a voltage source controlled by a control element 240;
- HTL hole transport layer
- an emissive layer 205 comprising an electroluminescent material
- an electron transport layer 206 or ETL, for “Electron Transport Layer” in English, in contact with a second electrode 207; - a second electrode 207, in particular an anode 207.
- ETL electron transport layer
- the anode and the cathode can be reversed in the stack of layers, connected to the voltage source controlled by the control element 240;
- a protective layer 209 in an at least partially transparent material, preferably glass.
- a material can be chosen because it allows high transparency.
- the electron transport layer 206 may comprise a material doped with electrons, that is to say it has excess electrons, promoting the transfer of electrons in the emissive layer 205.
- the hole transport layer 206 may comprise a material having an electron defect, or doped with holes, thus promoting the creation of holes in the emissive layer and thus promoting recombination in the emissive layer 205 leading to the emission of photons .
- the holes and electrons combine in the emissive layer, leading to the emission of photons whose properties depend in particular on the electroluminescent material of the emissive layer. Such a principle is well known and is not described further in the present description.
- the emissive layer 205 can thus emit photons when a voltage greater than a threshold voltage is applied to the electrodes 203 and 207.
- the light module 200 according to the second and third embodiments can also optionally include:
- a layer of optical index matching material 208 included between the protective layer 209 and the second electrode 207, capable of allowing light rays coming from the emissive layer 205 to pass through the protective layer 209.
- the light rays emitted by the emissive layer 205 can be directed towards a main direction of emission which is preferentially along the Z axis, therefore perpendicular to the surface of the protective layer 209.
- the properties and thickness of the optical index matching material layer 208 may depend on the optical index of the protective layer 209.
- the first electrode 203 comprises several conductive elements arranged at different positions in extending longitudinally along the axis second electrode 207 to select a position in Y. It is thus made possible to control the light module in a pixelated manner.
- the light module 200 can thus form a pixelated screen. However, such an achievement is optional.
- the first and second electrodes 203 and 207 can each comprise a single planar element extending continuously in different positions in X and in Y, so as to apply a voltage to a set of positions in X and Y of the emissive layer, these positions forming a light pattern.
- a light pattern may have a regular shape such as a square, a rectangle, a diamond or the like, or may have a more complex shape, including curves for example.
- the emissive layer 205 can have a given shape in the X-Y plane corresponding to the desired light pattern.
- the emissive layer 205 may be absent between layers 204 and 206, and the application of an electrical voltage to these locations thus produces no light rays, making it possible to produce light patterns.
- At least partial transparency of the light module 200 is permitted:
- each layer 201 and 209 is however preferably less than 2mm; - by the respective thicknesses of the electrodes 203 and 207, and of the layers 202, 204 to 206 and 208, which are less than 10 micrometers, preferably less than 1 micrometer.
- the emissive layer 205 comprises an inorganic electroluminescent material, for example an inorganic phosphor.
- the emissive layer 205 may comprise zinc sulphide, denoted ZnS, doped with manganese, denoted ZnS:Mn.
- ZnS:Mn zinc sulphide
- the ZnS:Mn material allows the emission of photons of wavelengths corresponding to a yellow or green color.
- Other inorganic electroluminescent materials can be provided according to the second embodiment.
- the emissive layer 205 may comprise Gallium-Indium Nitride, InGaN, which comprises Gallium Nitride GaN and Indium Nitride, InN.
- the wavelength of the light emitted by such a material can vary from the ultraviolet range to orange, depending on an Indium to Gallium ratio.
- the emissive layer 205 may comprise quantum dots or "quantum dots" in English based on Cadmium Selenium (CdSe), Copper-Indium (Culn), Indium Phosphorus (InP) and /or Lead Selenium (PbSe).
- the color of the emitted light can vary, particularly across all wavelengths in the visible range, depending on the size of the quantum dot. As an illustration, a 6 nanometer quantum dot is capable of emitting red light rays while a 2 nanometer quantum dot is capable of emitting blue light rays.
- Electrodes 203 and 207 may be made of indium tin oxide, or ITO. However, no restriction is attached to the material of the electrodes 203 and 207.
- the material of the transport layers 204 and 206 which can be tin oxide doped with antimony, also denoted ATO.
- some of the layers can be produced by a manufacturing process by deposition of atomic thin layers, also called ALD for “Atomic Layer Deposition” in English, which makes it possible to increase the transparency of the light module 200.
- ALD atomic thin layers
- such a manufacturing method can be used to manufacture the emissive layer 205, but also, optionally, to manufacture the transport layers 204 and 206, as well as for the ionic barrier layer 202 and the index matching layer optics 208.
- the deposited material does not form a continuous layer but is distributed in the X-Y plane according to a certain granularity, which increases the transparency of the layer and therefore of the light module 200.
- the bias voltage making it possible to activate the emission of photons in the emissive layer can be several hundred volts, for example equal to 195V.
- the control element 240 can thus control the voltage source supplying the electrodes 203 and 207 to apply such a voltage or to apply no voltage. It is thus made possible to activate and deactivate the light module 200 by the control element 240.
- the voltage is preferably applied at high frequency, in particular at a frequency between 400 Hz and 1 kHz.
- the light module according to the second embodiment also has the advantage of operating in a wide temperature range, in particular between -100°C and +105°C.
- the emissive layer 205 may comprise an organic electroluminescent material, for example an organic polymer.
- the light module 200 then forms an organic light emitting diode screen, called OLED, for “Organic Light Emitting Diode” in English.
- OLED organic Light emitting diode screen
- Layers 201 to 204 and 206 to 209 may be identical to those described with reference to the second embodiment.
- the light module 200 according to the second and third embodiments further comprises a light guide 105 as presented in the first embodiment:
- a light guide 105 can be arranged in place of the substrate 201, or against the substrate 201, the first light guide 105 comprising a first pattern engraved in the guide sheet 110, and the layer emissive 205 is distributed according to a second pattern, distinct from the first pattern.
- a light guide 105 can be arranged in place of the cover layer 209, or against the cover layer 209, the first light guide 105 comprising a first pattern engraved in the sheet of guide 110, and the emissive layer 205 is distributed in a second pattern, distinct from the first pattern.
- a first light guide 105 is arranged in place of the substrate 201, or against the substrate 201, the first light guide 105 comprising a first pattern engraved in its guide sheet 110, the emissive layer 205 is distributed according to a second pattern, and a second light guide 105 is arranged in place of the covering layer 209, or against the covering layer 209, the second light guide 105 comprising a third pattern engraved in its guide sheet, the first, second and third patterns being distinct.
- Figure 3 illustrates a light device 300 according to non-limiting embodiments of the invention.
- the light device 300 comprises at least one light module according to the first, second, third or fourth embodiment.
- Exemplary embodiments of the light module 100 according to the first embodiment will be described with reference to Figures 4, 5 and 6, which describe light modules 400, 500 and 600 respectively.
- the light module 100 according to the first embodiment can thus be a light module 400 according to a first example, a light module 500 according to a second example or a light module 600 according to a third example.
- the light module 200 corresponds to the second and third embodiments.
- the fourth embodiment can combine the light module 200 according to the second and third embodiments, with one or more of the examples of light modules 400, 500 and 600 described below, arranged in place of the substrate 201, or arranged against the substrate 201; and/or arranged in place of the covering layer 209, or arranged against the covering layer 209.
- the light module shown in Figure 3 encompasses all the embodiments and is referenced 100, 200.
- the light device 300 can include several light modules 100, 200.
- the light device 300 further comprises at least one lighting module 301.1 or 301.2 capable of projecting light rays towards the outside of the light device 300 to perform at least one lighting function.
- a lighting function can for example be a low beam LB function or a HB high beam function.
- the at least one lighting module 301.1 or 301.2 is controllable, for example by a control element 340, and can be controlled to perform two different lighting functions, such as the LB and HB functions. .
- No restrictions are attached to the technology associated with the lighting module. No restriction is particularly attached to the light source of the at least one lighting module 301.1 or 301.2, which may be a source comprising a light element or several light elements, such as one or more LEDs.
- the light source of the lighting module can be a matrix source, comprising a matrix of DMD type micro-mirrors, a matrix of LEDs, or any other matrix source.
- the light device 300 may optionally comprise one or more signaling modules 302.1, 302.2 and 302.3, capable of emitting light rays towards the outside of the light device to perform a signaling function.
- the signaling module may for example be able to perform a PL position light function or a DRL daytime signaling function.
- the at least one signaling module 302.1, 302.2 and/or 302.3 may be able to perform the two functions PL position light and DRL daytime signaling, only the light intensity emitted by the signaling module being able to vary between the two functions.
- Such a variation in light intensity can be obtained by activating/deactivating light sources of the signaling module, or by supplying the light source(s) with pulse width modulation, by varying the duty cycle.
- the light device 300 for a motor vehicle is preferably a motor vehicle headlight, for example a motor vehicle front headlight.
- light device 300 comprises:
- the light module 100, 200 is at least partially transparent as previously described and is arranged so as to be crossed by light rays emitted by the at least one lighting module 301.1 or
- the light module 100, 200 is capable of emitting light according to at least one given pattern, the given pattern having the same shape as an optical projection system of the at least one lighting module 301.1 or
- the control element 340 can thus activate the light module 100, 200 when the at least one lighting module 301.1 or 301.2 opposite which it is placed is deactivated.
- the light module 100, 200 can be arranged inside a lens of an optical system of at least one lighting module 301.1 or 301.2.
- the light device 300 comprises a housing and an external glass, which forms a closing glass of the housing, the at least one lighting module being arranged inside the internal volume created by the housing and the external ice so that at least part of the light rays it projects pass through the external ice.
- the light module 100, 200 can be arranged on one of the faces of the external glass of the light device facing the optical system of at least one lighting module 301.1 or 301.2.
- the light module 100, 200 can advantageously be arranged on the internal face of the external glass, which makes it possible to ensure protection of the light module 100, 200 against attacks from the external environment.
- the light module 100, 200 can also be arranged on the external face of the external glass, in particular when the structure of the light module 100, 200 makes it possible to resist the aforementioned attacks.
- the lighting device 300 comprises:
- first lighting module 301.1 can perform a low beam lighting function LB while the second lighting module 301.2 can perform a high beam lighting function HB;
- Each signaling module 302.1, 302.2 or 302.3 is capable of emitting light rays towards the outside of the light device to perform a signaling function.
- Each signaling module can perform a signaling function of its own, or alternatively, the signaling modules 302.1, 302.2 and 302.3 can perform the same signaling function(s), and thus be controlled together, for example by the element control 340;
- the lighting device comprises two light modules 100, 200, a first light module 100, 200 capable of being traversed by light rays coming from the first lighting module 301.1 and a second light module 100, 200 capable of to be crossed by light rays coming from the second lighting module 301.2.
- the control element 340 may be able to control the activation and deactivation of all the modules, that is to say the lighting module(s), the light module(s), and the optional signaling module(s).
- the control element integrates the functionalities of the control element 240 previously described according to the second and third embodiments.
- the control element 340 can control the activation, deactivation of each module as a function of control signals, received for example by a central control module of the motor vehicle, such as an electronic control unit, of the ECU type for “Electronic Control Unit” in English.
- the control element 340 may comprise a processor configured to communicate unidirectionally or bidirectionally, via one or more buses or via a wired connection, with a memory such as a “Random Access Memory” type memory, RAM, or a “Read Only Memory” type memory, ROM, or any other type of memory (Flash, EEPROM, etc.).
- the memory comprises several memories of the aforementioned types.
- the memory is a non-volatile memory.
- the processor is able to execute instructions stored in the memory and control the modules of the light device 300 as a function of control signals.
- the processor can be replaced by a microcontroller designed and configured to implement control of the modules based on the control signals received.
- each module among the light, lighting and signaling modules includes a dedicated control element.
- control element 340 is able to activate the light module(s) 100, 200 opposite a lighting module which is deactivated.
- the signature of the lighting device 100 which is constituted by the shapes of the signaling and lighting modules, and by their respective arrangements, is thus homogeneous whether the lighting module(s) are activated or not.
- the invention thus makes it possible to homogenize the signature of the light device 300.
- At least one light module 200 is capable of being crossed by the light rays coming from the lighting module 301.1 and/or lighting module 301.2.
- the emissive layer 205 can form a first pattern arranged facing the lighting module 301.1 and a second pattern arranged facing the lighting module 301.2.
- a first light module 200 comprises an emissive layer 205 forming a first light pattern arranged opposite the first lighting module 301.1 and a second light module 200 comprises an emissive layer 205 forming a second light pattern arranged opposite the second lighting module 301.2.
- the light patterns of the light module(s) 200 vary so as to be identical to the respective optical surfaces of the lighting modules that they cover. It is thus made possible to homogenize complex signatures between day and night periods.
- Figure 4 shows a first example of a light module 400 of a light device according to the first embodiment of the invention.
- the light module 400 comprises a light guide 405 comprising a guide sheet 410 and an injection element 420, and a light source 430, similar to the light guide 105 and the light source 130 of the light module 100 previously described .
- the guide sheet 410 is engraved so as to return the light rays injected by the injection element 420 according to a light pattern 450, following activation of the light source 430, by the control element 340.
- the pattern 450 is arranged opposite an optical projection surface of a lighting module.
- the pattern 450 can further be shaped to overlap with the optical projection surface of the lighting module.
- the pattern 450 can thus have the same shape as a projection in the plane of the guide sheet, of the optical projection surface of the lighting module.
- the invention thus makes it possible to homogenize the signature of the light device comprising a light module 400 arranged on a lighting module.
- the light module 400 can for example be used in the example of Figure 3, being arranged opposite the lighting module 301.1 or the lighting module 301.2.
- the light device 300 comprises a first light module identical to the light module 400 arranged opposite the first lighting module 301.1, and a second light module identical to the light module 400 arranged opposite the second lighting module 301 .2.
- the light modules 400 according to the first embodiment can be advantageously used in a light device comprising several lighting modules.
- the lighting modules have optical surfaces of different shapes
- the patterns 450 of the light modules 400 may be identical to the respective optical surfaces of the lighting modules that they cover. It is thus made possible to homogenize complex signatures between day and night periods.
- the light source 430 is controlled by the control element 340 previously described.
- the control element 340 can also control the lighting module opposite which the light module 400 is placed.
- the control element 340 is able to activate the light source 430 when it deactivates the lighting module .
- control element 340 can activate a first light module 400 arranged opposite the first lighting module 301.1, when the first lighting module 301.1 is deactivated, and the control element 340 can activate a second light module 400 arranged opposite the second lighting module 301.2, when the second lighting module 301.1 is deactivated.
- Figure 5 illustrates a second example of light module 500 of a lighting device according to the first embodiment of the invention, which is a variant of the light module 400 previously described.
- the light module 500 comprises a light guide 505 comprising a guide sheet 510 and an injection element 520, and a light source 530 similar to the light guide 105 and the light source 130 of the light module 100 previously described with reference to Figures 1a to 1c.
- the guide sheet 510 is engraved so as to return the light rays injected by the injection element 520 according to a first pattern 550.1 and according to a second pattern 550.2, following activation of the light source 530.
- the first pattern 550.1 is arranged facing a first optical projection surface of a first lighting module and the second pattern 550.2 is arranged facing a second optical projection surface of a second lighting module.
- the first and second patterns 550.1 and 550.2 can also be shaped to overlap with the optical projection surfaces of the first and second lighting modules.
- the first and second patterns 550.1 and 550.2 can thus have the same shapes as projections in the plane of the guide sheet 510, of the optical projection surfaces of the lighting modules.
- the invention thus makes it possible to homogenize the signature of the light device comprising a light module 500 arranged on several lighting modules, using a single light guide 505 and a single light source 530. The size and costs are thus reduced.
- the light module 500 can for example be used in the example of Figure 3, being arranged opposite the lighting modules 301.1 and 301.2.
- a single light module 500 can be advantageously used in a light device comprising several lighting modules.
- the lighting modules have optical surfaces of different shapes
- the patterns 550.1 and 550.2 have different shapes so as to be identical to the respective optical surfaces of the lighting modules which they cover. It is thus made possible to homogenize complex signatures between day and night periods.
- the light source 530 is controlled by the control element 340 previously described.
- the control element 340 can also control the lighting modules opposite which the light module 500 is placed.
- the control element 340 is able to activate the light source 530 when it deactivates at least one lighting modules of the light device.
- control element 340 can activate the light module 500 arranged opposite the first lighting module 301.1 and the second lighting module 301.2, when the first lighting module 301.1 is deactivated, when the second lighting module 301.1 is deactivated or when the first and second lighting modules 301.1 and 301.2 are deactivated.
- Figure 6 illustrates a light module 600 according to the first embodiment of the invention, which is a variant of the light modules 400 and 500 previously described.
- the light module 600 comprises a light guide 605 comprising a guide sheet 610, a first injection element 620.1 and a second injection element 620.2, and a first light source 630.1 and a second light source 630.2.
- a light guide 605 comprising a guide sheet 610, a first injection element 620.1 and a second injection element 620.2, and a first light source 630.1 and a second light source 630.2.
- the guide sheet 610 is engraved according to a first pattern 650.1 located in a first part of the guide sheet 610, and a second pattern 650.2 located in a second part of the guide sheet 610.
- the first light source 630.1 is capable of injecting light into the first injection element 620.1 which is itself capable of injecting, or distributing, the light in the first part of the guide sheet so as to illuminate according to the first light pattern 650.1.
- the first injection element 620.1 which is itself capable of injecting, or distributing, the light in the first part of the guide sheet so as to illuminate according to the first light pattern 650.1.
- the first injection element 620.1 which is itself capable of injecting, or distributing, the light in the first part of the guide sheet so as to illuminate according to the first light pattern 650.1.
- the first injection element 620.1 which is itself capable of injecting, or distributing, the light in the first part of the guide sheet so as to illuminate according to the first light pattern 650.1.
- the first injection element 620.1 which is itself capable of injecting, or distributing, the light in the first part of the guide sheet so as to illuminate according to the first light pattern 650.1.
- the first injection element 620.1 which is itself capable of injecting, or distributing, the
- the second light source 630.2 is capable of injecting light into the second injection element 620.2 which is itself capable of injecting, or distributing, the light in the second part of the guide sheet 610 so as to illuminate according to the second reason 650.2.
- the second injection element 620.2 which is itself capable of injecting, or distributing, the light in the second part of the guide sheet 610 so as to illuminate according to the second reason 650.2.
- the second injection element 620.2 which is itself capable of injecting, or distributing, the light in the second part of the guide sheet 610 so as to illuminate according to the second reason 650.2.
- the second injection element 620.2 which is itself capable of injecting, or distributing, the light in the second part of the guide sheet 610 so as to illuminate according to the second reason 650.2.
- the second injection element 620.2 which is itself capable of injecting, or distributing, the light in the second part of the guide sheet 610 so as to illuminate according to the second reason 650.2.
- the second injection element 620.2 which is itself capable of injecting,
- the first pattern 650.1 can be arranged facing a first optical projection surface of a first lighting module and the second pattern 650.2 can be arranged facing a second optical projection surface of a first lighting module. a second lighting module.
- the first and second patterns 650.1 and 650.2 can also be shaped to overlap with the optical projection surfaces of the first and second lighting modules.
- the light patterns 650.1 and 650.2 can thus have the same shapes as projections in the plane of the guide sheet 610, of the optical projection surfaces of the lighting modules.
- the sources 630.1 and 630.2 can be controlled separately, for example by the control element 340.
- control element 340 simultaneously activates the sources 630.1 and 630.2, and the light patterns 650.1 and 650.2 are thus displayed when at least one of the first and second lighting modules is deactivated.
- the invention thus makes it possible to harmonize the signature of the light device comprising a light module 600 arranged on several lighting modules, using a single light guide 605, and by making it possible to selectively illuminate the first and second patterns 650.1 and 650.2 .
- the light module 600 can for example be used in the example of Figure 3, by being arranged opposite the lighting modules 301.1 and 301.2.
- a single light module 600 can advantageously be used in a light device comprising several lighting modules.
- the lighting modules have optical projection surfaces of different shapes
- the first and second patterns 650.1 and 650.2 have different shapes so as to be identical to the respective optical surfaces of the lighting modules which they cover. It is thus made possible to harmonize complex signatures between day and night periods.
- the light sources 630.1 and 630.2 are controlled by the control element 340 previously described.
- the control element 340 can also control the lighting modules opposite which the light module 600 is placed.
- the control element 340 is capable of selectively activating the light sources 630.1 and 630.2 when it deactivates the at least one of the lighting modules of the light device.
- control element 340 activates the light source 630.1 so as to emit light according to the first light pattern 650.1 arranged opposite the first lighting module 301.1 when the first module lighting 301.1 is deactivated, and activates the light source 630.2 so as to emit light according to the second light pattern 650.2 arranged opposite the second lighting module 301.2 when the second lighting module 301. 2 is disabled.
- the pattern(s) of the light module 100, 200 can be controlled depending on the activation of one of the signaling modules.
- the control element 340 can in particular control the light module(s) 100, 200, the lighting module(s), but also one or more signaling modules, such as those shown in Figure 3.
- the element control 340 can advantageously activate the light source(s) of the light module 100, 200 when the DRL daytime signaling function is activated on at least one of the signaling modules responsible for this signaling function.
- Such a function being activated during the day it is thus ensured that the light sources of the light modules are activated during the day, which makes it possible to homogenize the signature of the lighting device 300 between daytime driving situations and those of night.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Electroluminescent Light Sources (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23730026.4A EP4533148A1 (fr) | 2022-05-31 | 2023-05-26 | Dispositif lumineux avec un module lumineux agence devant un module d´eclairage |
| CN202380041896.5A CN119278395A (zh) | 2022-05-31 | 2023-05-26 | 具有被布置在照明模块前方的发光模块的发光设备 |
| US18/867,237 US20250327553A1 (en) | 2022-05-31 | 2023-05-26 | Lighting device having a lighting module arranged in front of an illumination module |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2205246A FR3136038B1 (fr) | 2022-05-31 | 2022-05-31 | Dispositif lumineux avec un module lumineux à nappe de guidage flexible, agencé devant un module d’éclairage |
| FRFR2205246 | 2022-05-31 | ||
| FR2214233A FR3136040A1 (fr) | 2022-05-31 | 2022-12-22 | Dispositif lumineux avec un module lumineux agencé devant un module d’éclairage |
| FRFR2214233 | 2022-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023232706A1 true WO2023232706A1 (fr) | 2023-12-07 |
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ID=86760188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/064249 Ceased WO2023232706A1 (fr) | 2022-05-31 | 2023-05-26 | Dispositif lumineux avec un module lumineux agence devant un module d´eclairage |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250327553A1 (fr) |
| EP (1) | EP4533148A1 (fr) |
| CN (1) | CN119278395A (fr) |
| WO (1) | WO2023232706A1 (fr) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011130715A2 (fr) | 2010-04-16 | 2011-10-20 | Flex Lighting Ii, Llc | Dispositif d'éclairage comprenant un guide de lumière basé sur un film |
| US20160369967A1 (en) * | 2013-07-02 | 2016-12-22 | Koito Manufacturing Co., Ltd. | Vehicle lamp |
| US20180086028A1 (en) * | 2015-04-03 | 2018-03-29 | Saint-Gobain Glass France | Luminous automotive-vehicle glazing unit and automotive vehicle with such a glazing unit |
| US20180245763A1 (en) * | 2015-08-21 | 2018-08-30 | Mitsubishi Electric Corporation | Lighting apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2956720B1 (fr) * | 2010-02-19 | 2013-03-15 | Valeo Vision | Systeme optique de vehicule automobile |
| US20180017224A1 (en) * | 2016-07-12 | 2018-01-18 | GM Global Technology Operations LLC | Vehicle lamp assembly with rear-lit oled |
-
2023
- 2023-05-26 CN CN202380041896.5A patent/CN119278395A/zh active Pending
- 2023-05-26 WO PCT/EP2023/064249 patent/WO2023232706A1/fr not_active Ceased
- 2023-05-26 US US18/867,237 patent/US20250327553A1/en active Pending
- 2023-05-26 EP EP23730026.4A patent/EP4533148A1/fr active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011130715A2 (fr) | 2010-04-16 | 2011-10-20 | Flex Lighting Ii, Llc | Dispositif d'éclairage comprenant un guide de lumière basé sur un film |
| US9110200B2 (en) * | 2010-04-16 | 2015-08-18 | Flex Lighting Ii, Llc | Illumination device comprising a film-based lightguide |
| US20160369967A1 (en) * | 2013-07-02 | 2016-12-22 | Koito Manufacturing Co., Ltd. | Vehicle lamp |
| US20180086028A1 (en) * | 2015-04-03 | 2018-03-29 | Saint-Gobain Glass France | Luminous automotive-vehicle glazing unit and automotive vehicle with such a glazing unit |
| US20180245763A1 (en) * | 2015-08-21 | 2018-08-30 | Mitsubishi Electric Corporation | Lighting apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| US20250327553A1 (en) | 2025-10-23 |
| EP4533148A1 (fr) | 2025-04-09 |
| CN119278395A (zh) | 2025-01-07 |
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