Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
  • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
  • F21S41/141—Light emitting diodes [LED]
• • 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
  • B60Q1/0058—Stacked, i.e. one lamp located behind the other in the optical axis direction
• • 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
  • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
  • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
  • F21S41/141—Light emitting diodes [LED]
  • F21S41/155—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
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
  • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
  • F21S41/18—Combination of light sources of different types or shapes
• • 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
  • F21S41/24—Light guides
• • 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
• • 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
  • F21S43/14—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
• • 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
  • F21S43/249—Light guides with two or more light sources being coupled into the light guide
• • 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

Definitions

• the invention relates to lighting devices which are capable of providing photons, and more specifically those which comprise at least one organic light-emitting diode (or OLED).
• OLED organic light-emitting diode
• the term "lighting device” a device for illuminating and / or participate in a signaling function and / or light signature, whether indoors or outdoors.
• lighting devices comprising at least one light source with light emitting diode (s) are used.
• s organic (or OLED (s) ("Organic Light-Emitting Diode (s)”)
• OLED Organic Light-Emitting Diode
• lighting devices can be part of optical blocks.
• Light-Emitting Diodes When we want to have several light features, possibly combinable, in a small area, we are forced to place alongside each other OLEDs and / or LEDs ("Light-Emitting Diodes"), which is is relatively bulky and may require the presence of additional elements, such as masks, reflectors, diffusers or lenses. This is particularly the case now when it is desired, for example, that a light of a first wavelength, emitted by an OLED, be surrounded at least partially by at least one other light, emitted by another OLED or LED and having either the same first wavelength and a different intensity, or a second wavelength and possibly a different intensity.
• the purpose of the invention is in particular to improve the situation.
• a lighting device comprising at least one organic light-emitting diode capable of delivering first photons by an emission face solidly fixed to an entrance face of a protective layer which is transparent to the first photons. to allow the output of these by a primary zone of an output face.
• At least one electroluminescent diode capable of delivering second photons
• a first light emitted by an OLED can now be surrounded at least partially by at least a second light emitted by an LED, for a small overall size.
• the lighting device according to the invention may comprise other characteristics that can be taken separately or in combination, and in particular:
• its protective layer may be able to guide the second photons received until they reach a secondary zone of the input face which is situated in the vicinity of a second lateral face opposed to the first side face, which surrounds an end of the emission face and which has a profile inclined relative to the second side face and adapted to deflect the trajectories of the second guided photons that it receives to a tertiary zone of the exit face, located opposite it and surrounding an end of a primary zone; the profile may be chosen from (at least) a linear inclined profile of an acute angle strictly less than 90 ° and a parabolic profile;
• each secondary zone of the entry face of its protective layer may be provided with deflection means capable of deflecting the trajectories of the second guided photons it receives towards a tertiary zone of the face of exit, located opposite it and partially surrounding at least one primary zone;
• the deflection means may be selected from (at least) three-dimensional structures and markings;
• the exit face of its protective layer may be able to diffuse, in at least one predefined place, the first photons and / or the second photons;
• the first and second photons may have the same wavelength. Alternatively, the first and second photons may have different wavelengths.
• the invention also proposes a vehicle optical unit, possibly of automobile type, and comprising at least one lighting device of the type of that presented above.
• the invention also proposes a vehicle, possibly of automobile type, and comprising at least one optical block of the type of that presented above.
• FIG. 1 schematically and functionally illustrates, in a sectional view in a transverse plane (YZ), a first exemplary embodiment of a lighting device according to the invention
• FIG. 2 schematically illustrates, in a bottom view (pan XY), the lighting device of FIG. 1, with the materialisation of the zones through which the photons that it generates emerge,
• FIG. 3 schematically and functionally illustrates, in a sectional view in a transverse plane (YZ), a second exemplary embodiment of a lighting device according to the invention.
• FIG. 4 schematically illustrates, in a bottom view (XY plane), the lighting device of Figure 3, with the materialization of the areas through which the photons it generates.
• the object of the invention is in particular to propose a lighting device DE comprising at least one organic light-emitting diode (or OLED) DOk and at least one light-emitting diode (or LED) capable of providing lights which surround themselves at least partially. to illuminate and / or participate in a signaling function and / or light signature.
• a lighting device DE comprising at least one organic light-emitting diode (or OLED) DOk and at least one light-emitting diode (or LED) capable of providing lights which surround themselves at least partially. to illuminate and / or participate in a signaling function and / or light signature.
• the lighting device DE is intended to be part of a vehicle optical unit, possibly of automotive type.
• this optical unit can be a front projector or a rear light.
• a lighting device DE can be an independent equipment of an optical unit. In this case, it has its own housing, and can, for example, be installed in different systems, devices or installations, indoors and outdoors.
• a lighting device DE can be part of any type of vehicle, land, sea (or fluvial), or air, or any type of installation (including industrial), or any type of building.
• the reference (X, Y, Z) defines three directions of space which are perpendicular to each other (two by two).
• a lighting device DE comprises at least one organic light-emitting diode DOk, fixedly affixed to an entry face FE2 of a first protective layer (or encapsulation) CP1, and at least one light emitting diode Dj.
• the (each) organic light-emitting diode (or OLED) DOk is adapted to deliver first photons by a transmission face FE1 which is fixedly secured to the entry face FE2 of the first protective layer CP1. It will be understood that, in the presence of several organic light-emitting diodes DOk, the input face FE2 of a first protective layer CP1 is firmly fixed to the respective emission faces FE1 of these organic light-emitting diodes DOk.
• This first protective layer CP1 is transparent to the first photons to allow the output of the latter by a primary zone ZPk of an output face FS2 that it comprises and which is opposite its input face FE2.
• the input faces FE2 and FS2 of the protective layer CP1 are parallel to each other and contained in XY planes.
• the lighting device DE may also and possibly comprise a second protective layer (or encapsulation layer) CP2 integral with a reflecting face of each organic light-emitting diode DOk, located opposite each emission face FE1.
• a second protective layer or encapsulation layer
• the (each) electroluminescent diode Dj is able to deliver second photons in the vicinity of a first lateral face FL1 (or slice) of the first protective layer CP, which joins its input faces FE2 and FS2 output.
• this first lateral face FL1 is contained in an XY plane and therefore perpendicular to the input FE2 and output FS2 faces, as shown without limitation in FIGS. 1 and 3.
• the first protective layer CP also comprises a second lateral face FL2, opposite to its first lateral face FL1 and contained in an XY plane in the examples illustrated nonlimitingly in FIGS. 1 and 3.
• This first protective layer CP1 is more adapted to (or arranged to) guide by internal reflections the second photons, which it received on its first lateral face FL1, until they reach at least one secondary zone ZSm from its FE2 entrance face.
• This / each secondary zone ZSm partially surrounds the emission face FE1 of at least one organic light-emitting diode DOk and is adapted to deflect trajectories of second guided photons that it receives towards a tertiary zone ZTm of the output face FS2 of the first protective layer CP1, which is located opposite it (ZSm) and which partially surrounds the primary zone ZPk of the organic light-emitting diode DOk.
• the first protective layer CP1 is therefore also transparent to the second photons.
• this first protective layer CP1 may be made of glass or a transparent plastic material.
• the possible second layer of protection (or encapsulation) CP2 may be made of glass or a transparent plastic material.
• the (each) organic light-emitting diode DOk being placed in front of the side face FL1 (or slice) and its second photons benefiting from the internal guidance and the path deflection in the first protective layer CP1, a lighting device is available.
• DE of small overall size, which is particularly advantageous when the available space is reduced.
• the arrangement of the lighting device DE allows a first light emitted by an OLED DOk to be at least partially surrounded by at least a second light emitted by an LED Dj. It will be noted that it also makes it possible to provide at the outlet face FE2 at least a first light or at least a second light.
• first and second photons may have either the same wavelength or different wavelengths.
• DOK OLEDs it can be envisaged that they have different wavelengths, and that they may be used independently of one another (and therefore together or separately).
• the intensities of the first and second lights may be substantially identical or different. In the presence of several DOK OLEDs, it can be envisaged that they provide lights of different intensities, and that they may be used independently of one another (and thus together or separately).
• the lighting device DE thus allows a wide variety of features for a small overall footprint, which is particularly advantageous when the available space is reduced.
• the profile of the input face FE2 at the secondary zone ZS1 is linear, inclined at an acute angle strictly less than 90 °.
• this acute angle can be chosen equal to 45 °.
• other angle values can be chdsies according to the application needs.
• other profiles may be used according to the application requirements, and in particular a parabolic profile, a spherical profile, an elliptical profile, and more generally any shape suitable for returning light to a tertiary zone ZTm.
• Diagrammatically illustrated in FIG. 1 are (dashed) paths of the first photons emitted by the organic light-emitting diode DO1 and passing through the first protective layer CP1 to exit at the primary zone ZP1, and paths (in solid lines).
• FIG. 2 diagrammatically illustrates the lighting device DE of FIG. 1 with the materialization of the primary zones ZP1. (in white) and tertiary ZT1 (in gray) through which the first and second generated photons emerge.
• the tertiary zone ZT1 surrounds the part of the primary zone ZP1 which is situated on the side of the second lateral face FL2 of the first protective layer CP1.
• Each secondary zone ZSm is provided with deflection means MDm which are adapted to deflect the trajectories of the second guided photons that it receives to an associated tertiary zone ZTm of the output face FS2, which is located opposite it (ZSm) and which partially surrounds at least one primary zone ZPk.
• the deflection means MDm can be three-dimensional structures (or 3D) or markings.
• the three-dimensional structures can be defined by laser or chemical etching, or by pad printing, or by applying a film, for example.
• these three-dimensional structures can be in different forms, and in particular in the form of prisms or gadroons (circular semi-cylinders).
• the markings may, for example, be defined with ink (when the light encounters a pattern created by the ink, it is diffused substantially Lambertian, which produces consistent results luminance perceived by the observer).
• FIG. 3 diagrammatically illustrates (dashed) paths of the first photons emitted by the three organic light-emitting diodes DO1 to DO3 and passing through the first protective layer CP1 to exit at the three primary zones ZP1 to ZP3, and paths (in solid lines) second photons emitted by the light-emitting diodes D1 and D2 and guided in the first protective layer CP1 to the different secondary zones ZS1 to ZS6 where their trajectories are deflected to the different tertiary zones ZT1 to ZT6 of the face FS2 output by which they come out of the lighting device DE.
• FIG. 4 diagrammatically illustrates the lighting device DE of FIG. 3 with the materialization of the primary zones ZP1 to ZP3 (in white) through which the first generated photons and the tertiary zones ZT1 to ZT6 emerge (in gray) through which the second generated photons emerge.
• this second example :
• the first deflection means MD1 of the first secondary zone ZS1 deflect the trajectories of the second photons towards the first tertiary zone ZT1 which surrounds the part of the primary zone ZP1 which is located on the side of the first lateral face FL1 of the first layer of CP1 protection,
• the second secondary zone ZS2 is situated between the two OLEDS D01 and D02 and its second deflection means MD2 deflect second photons towards the second tertiary zone ZT2 which surrounds the part of the first primary zone ZP1 which is oriented towards the second lateral face FL2 of the first protective layer CP1 and that part of the second primary zone ZP2 which is oriented towards the first lateral face FL1 of the first protective layer CP1,
• the third secondary zone ZS3 is situated between the two OLEDS DO2 and DO3 and its third deflection means MD3 deflect second photons towards the third tertiary zone ZT3 which surrounds the part of the second primary zone ZP2 which is oriented towards the second lateral face FL2 of the first protective layer CP1 and the part of the third primary zone ZP3 which is oriented towards the first lateral face FL1 of the first protective layer CP1,
• the fourth deflection means MD4 of the fourth secondary zone ZS4 deflect the trajectories of the second photons towards the fourth tertiary zone ZT4 which surrounds the part of the third primary zone ZP3 which is situated on the side of the second lateral face FL2 of the first layer CP1 protection,
• the fifth MD5 deflection means of the fifth secondary zone ZS5 deflect the trajectories of the second photons towards the fifth tertiary zone ZT5 which surrounds the parts of the first ZP1, second ZP2 and third ZP3 primary zones which are oriented towards a third lateral face FL3 of the first protective layer CP1 which joins the first FL1 and second FL2 side faces FL1, and
• the sixth deflection means MD6 of the sixth secondary zone ZS6 deflect the trajectories of the second photons towards the sixth tertiary zone ZT6 which surrounds the parts of the first ZP1, second ZP2 and third ZP3 primary zones which are oriented towards a fourth lateral surface FL4 of the first protective layer CP1 which is opposed to the third side face FL3 and joins the first FL1 and second FL2 side faces.
• the output face FS2 of the first protective layer CP1 may be able to diffuse, in at least one predefined place, the first photons and / or the second outgoing photons. To do this, it can include in each predefined location a two-dimensional or three-dimensional structuring (for example balls of scattering material included in the mass) or a coating or surface treatment inducing diffusion.
• a two-dimensional or three-dimensional structuring for example balls of scattering material included in the mass
• a coating or surface treatment inducing diffusion for example balls of scattering material included in the mass
• the invention offers several advantages, among which:

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Microelectronics & Electronic Packaging (AREA)
• General Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Electroluminescent Light Sources (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=57909664

Family Applications (1)

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Family Cites Families (4)

• 2016
  • 2016-11-15 FR FR1661014A patent/FR3058775B1/fr not_active Expired - Fee Related
• 2017
  • 2017-10-24 CN CN201780071019.7A patent/CN109964077A/zh active Pending
  • 2017-10-24 WO PCT/FR2017/052924 patent/WO2018091794A1/fr unknown
  • 2017-10-24 EP EP17797978.8A patent/EP3542096A1/de not_active Withdrawn

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