EP2529149A1 - Dispositif optique, notamment pour véhicule automobile - Google Patents
Dispositif optique, notamment pour véhicule automobileInfo
- Publication number
- EP2529149A1 EP2529149A1 EP11701500A EP11701500A EP2529149A1 EP 2529149 A1 EP2529149 A1 EP 2529149A1 EP 11701500 A EP11701500 A EP 11701500A EP 11701500 A EP11701500 A EP 11701500A EP 2529149 A1 EP2529149 A1 EP 2529149A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- source
- lenses
- lens
- sources
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 25
- 230000011664 signaling Effects 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims description 6
- 238000005034 decoration Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000005375 photometry Methods 0.000 description 4
- 239000012044 organic layer Substances 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000009131 signaling function Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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]
- 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
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
-
- 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
- F21S43/20—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
- F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
-
- 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
- F21Y2105/00—Planar light sources
-
- 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
- F21Y2115/10—Light-emitting diodes [LED]
- F21Y2115/15—Organic light-emitting diodes [OLED]
Definitions
- Optical device in particular for a motor vehicle
- the invention relates to an optical device, especially for a motor vehicle, such as a lighting and / or signaling device including a photometric function useful for the road traffic of the vehicle, allowing the vehicle to be seen by other vehicles or the driver of the said vehicle to see outside.
- a lighting and / or signaling device including a photometric function useful for the road traffic of the vehicle, allowing the vehicle to be seen by other vehicles or the driver of the said vehicle to see outside.
- an organic light-emitting diode of current technology may not be sufficient to provide certain signaling functions (such as the signaling functions "city lamp”, “braking signaling” and “raised braking signaling”).
- An organic electroluminescent diode of current technology typically provides a luminance of 1000 Cd / m2 whereas to provide the above functions, it would require a luminance of 5000 to 10,000 Cd / m2.
- organic light-emitting diodes can have the following characteristics:
- the first feature is favorable (because the luminous homogeneity is appreciated for example by car manufacturers), the other two characteristics can be troublesome to the extent that a fire is often curved.
- the minimum regulatory light intensity values (4 Cd for a lantern) would impose large luminous surfaces.
- the invention aims in particular to overcome the aforementioned drawbacks.
- the invention thus relates to an optical device for a motor vehicle, in particular a signaling and / or lighting device, this device comprising:
- At least one lens in particular at a distance from the surface light source, disposed at least partially in the path of the light emitted by the surface light source so as to produce an image of an object area of the surface light source.
- the image can be formed infinitely or in front of the lens or behind it.
- the invention makes it possible to obtain certain effects, in particular of depth, by adjusting the relative position of the source and the lens, the size of the source and the focal length of the lens.
- the invention makes it possible in particular to increase the emitted light intensity and / or to create a depth effect.
- the surface light source is preferably an organic light-emitting diode (OLED).
- OLED organic light-emitting diode
- the light emission area of the surface light source may be greater than 1 cm 2 or even 10 cm 2.
- the device comprises a plurality of lenses associated with one or more surface sources of light, these lenses having different focal lengths and / or being disposed at different distances from the surface source or sources of light, so as to create a plurality images.
- These lenses are preferably arranged, with respect to a given optical axis, at different axial positions.
- the lens or lenses may for example have a meniscus shape, or alternatively have a planar entry face and a convex exit face, or alternatively convex entry and exit faces.
- the surface light source or sources define a plurality of object areas
- the device comprises a plurality of lenses each being associated with one of said object areas to form an image of this object. object area.
- These object areas may be flat or non-planar, one of these object areas may for example be raised at least locally.
- the lenses are formed on a common piece made in one piece
- the lenses are made on separate parts.
- the device comprises at least three lenses, in particular of different focal lengths, associated with the surface source or sources of light.
- the object areas of the surface light sources extend substantially in the same plane, this plane being in particular substantially perpendicular to an optical axis of the device.
- the device in particular the lenses, are arranged to form images corresponding to the object areas, images which are offset with respect to each other along the optical axis, in particular way to create a depth effect.
- the object areas of the surface light sources are disposed at different positions along the optical axis of the device.
- the plurality of light sources can be arranged at different positions along the optical axis of the device.
- the lenses are arranged to form images corresponding to the object areas, images which are substantially in the same plane and / or substantially connected to each other.
- the object zone and / or its image by the lens has a shape chosen from: polygonal (for example rectangular), curve (for example circular or oval), annular ...
- the object zone or even the surface source of light, has an area smaller than that of the corresponding lens.
- the efficiency is improved, ie the shape of the beam and the light intensity in the axis,
- the source may be comparable in size to the lens
- the surface source of light is unique and forms a plurality of object areas, preferably associated with several lenses.
- each object zone is associated with a surface source of clean light.
- the lens is arranged to increase the light intensity in a predetermined region, in particular substantially in the center of the beam.
- At least one of the lenses may be a Fresnel lens.
- the sources may be on inclined planes with respect to the axis of the vehicle and the lenses are deposited on a prism so as to redirect the beam along the vehicle axis.
- the source is defocused, in particular axially, with respect to the lens.
- the device is arranged as a signaling device, in particular for a flashing light or a brake light, or a city lamp.
- the surface light source preferably comprises an organic light-emitting diode (OLED) or, alternatively, may comprise a lamp or an LED (light-emitting diode provided with a small chip) associated with an optical diffuser, this lamp or this LED. being placed behind the optical diffuser arranged to diffuse light from this lamp or this LED.
- OLED organic light-emitting diode
- LED light-emitting diode provided with a small chip
- FIG. 1 illustrates, schematically and partially, an exemplary structure of an organic light-emitting diode
- FIG. 2 represents, schematically and partially, a device according to an exemplary implementation of the invention
- FIG. 3 illustrates photometric grids respectively for an OLED alone and an OLED with a lens, according to FIG. 2,
- the diagrams a / and b / of FIG. 4 show iso-candela curves given respectively by the source alone and by the source associated with the lens
- FIG. 5 illustrates, schematically and partially, an optical device according to another example of implementation of the invention
- FIGS. 6 and 7 show, schematically and partially, devices according to still further examples of implementation of the invention
- FIG. 8 is a diagrammatic and partial view, in plan view, of devices according to examples of the invention.
- FIG. 1 shows an organic light-emitting diode 1 capable of forming a surface light source within the meaning of the present invention.
- This source 1 comprises:
- a substrate 2 for example made of glass
- a cathode 5 for example made of aluminum
- the surface light source within the meaning of the present invention may optionally be of a technology other than an OLED.
- FIG. 2 shows a device 10 according to an exemplary embodiment of the invention, comprising a surface source of light 1, for example an OLED, and a lens 1 1 placed in front of the source 1, on an axis Optical X.
- a surface source of light for example an OLED
- a lens 1 1 placed in front of the source 1, on an axis Optical X.
- the lens 1 1 has a flat input face 12 and a convex exit face 13.
- the reference R denotes a light ray coming from the source 1.
- the reference D denotes the distance between the source 1 and the lens 1 1.
- Diagram a / of Figure 3 corresponds to a photometric grid of OLED 1 alone.
- the diagram b / of FIG. 3 corresponds to a photometric grid obtained with the OLED 1 and the lens 1 1 placed in front of, according to the invention.
- the invention makes it possible to optimize the photometric distribution and thus to increase the efficiency of the optical device.
- the homogeneity of the OLED is all the more guaranteed that its dimensions are small. This is an additional argument to try to reduce the surface.
- the OLED 1 is centered on the optical axis X and its dimensions are 20 mm in width and 12 mm in height.
- the lens 1 1 plane / convex is focused on the center of the source 1.
- Its input face 12 is located at a distance D of 17 mm from the source.
- Diagrams a / and b / in FIG. 4 show the isobarget curves given respectively by the source 1 alone and by the source 1 associated with the lens 11.
- That of the source alone (case a / of Figure 4) is symmetrical of revolution according to the indicator.
- the beam takes a substantially rectangular shape much better adapted to the regulations (case b / of FIG. 4).
- the photometric levels are higher. More precisely, by comparing the photometric grids (diagrams a / and b / of FIG. 3), it is found that the gain is more than 50% in the center while keeping values similar to 20 °.
- the source 1 is preferably located at +/- 7mm from the focus point of the lens and in axial defocusing.
- the first curve corresponds to the sum of five photometric points: H-5 °, HV, H + 5 °, V-5 ° and V + 5 °.
- C1 gives an idea of the amount of light directed towards the center of the beam.
- the second curve C2 corresponds to the sum of the following six photometric points: H-10 ° V + 5 ° (point 10 ° on the left and 5 ° on the top), H-10 ° V0 °, H-10 ° V-5 ° , H + 10 ° V + 5 °, H + 10 ° V0 °, H + 10 ° V-5 °.
- C2 gives an idea of the amount of light directed into the intermediate areas of the beam.
- the third curve C3 corresponds to the sum of the following eight photometric points: H-20 ° V + 5 °, H-20 ° V-5 °, H-5 ° V + 10 °, H-5 ° V-10 °, H + 20 ° V + 5 °, H + 20 ° V-5 °, H + 5 ° V + 10 °, H + 5 ° V-10 °.
- C3 gives an idea of the amount of light directed towards the edges of the beam.
- the abscissas correspond to the axial defocus value expressed in mm, the positive values being used when the source approaches the lens.
- the ordinates represent the sum of the intensities (in candelas) of the photometric points mentioned above.
- the photometry at the center of the beam is very stable, at least in the zone ranging from -10 to + 10mm.
- the photometry of the intermediate zones of the beam is also very stable, between -5 to + 10mm.
- FIG. 5 (more precisely, on the left of FIG. 5) shows an example of an optical device 20 according to the invention.
- the lens 1 1 a from the top has a focal length f double the distance D at which the source 1 is located.
- Lens 1 1b of the center is neutral. It is a blade with parallel faces.
- the lens 1 1 c of the bottom has a focal length f half of the distance D to the source.
- the source of the center (its image actually) is unchanged.
- the bottom source (its image actually) seems to be located in front of the fire.
- the sources appear to be located at stepped locations. In fact, they are all in the same plane P.
- the device can form a lantern or a stop light ...
- the sources 1 can themselves be located on planes P1 and P2 staggered along the optical axis X, so as to follow the curve imposed by the vehicle.
- the source 1 is unique and the optical device comprises two distinct lenses 11a and 11b associated with this source, to form two distinct images. 1 '.
- the optical device can be arranged to be used inside the passenger compartment of the motor vehicle, for example as an interior decoration or lighting light.
- the plurality of light sources 1 may be arranged at different positions along the optical axis X of the device ( Figure 8a).
- FIG. 8 This is illustrated in FIG. 8, in which it can be seen that the distance E1 between, for example, the leftmost source 1, among a plurality of sources 1 offset axially, and an ice 30 of the device (FIG. 8a) is smaller than the distance E2 between the single source 1 and the ice 30 (FIG. 8b).
- the invention makes it possible to better adapt to the curve of the fire and thus reduce the bulk.
- the sources 1 are in different planes and the lenses 11 also.
- the lenses 11 may be arranged, in front view, along curves or surfaces. Some examples are given in Figure 10:
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1050489A FR2955538B1 (fr) | 2010-01-26 | 2010-01-26 | Dispositif optique, notamment pour vehicule automobile |
PCT/EP2011/050849 WO2011092121A1 (fr) | 2010-01-26 | 2011-01-21 | Dispositif optique, notamment pour véhicule automobile |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2529149A1 true EP2529149A1 (fr) | 2012-12-05 |
Family
ID=42289348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11701500A Pending EP2529149A1 (fr) | 2010-01-26 | 2011-01-21 | Dispositif optique, notamment pour véhicule automobile |
Country Status (4)
Country | Link |
---|---|
US (1) | US9441805B2 (fr) |
EP (1) | EP2529149A1 (fr) |
FR (1) | FR2955538B1 (fr) |
WO (1) | WO2011092121A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2979593B1 (fr) | 2011-09-02 | 2014-09-12 | Valeo Vision | Dispositif optique, notamment pour vehicule automobile |
US10551028B2 (en) * | 2013-12-05 | 2020-02-04 | Harman Professional Denmark Aps | Illumination device with different distances between light sources and lenslets |
US10502391B2 (en) | 2013-12-05 | 2019-12-10 | Harman Professional Denmark Aps | Light collector with a plurality of lenslets packed in an optimized dense circular pattern |
US10910103B2 (en) | 2018-12-14 | 2021-02-02 | Verb Surgical Inc. | Method and system for extracting an actual surgical duration from a total operating room (OR) time of a surgical procedure |
FR3137438B1 (fr) | 2022-06-30 | 2024-07-26 | Valeo Vision | Module lumineux avec affichage par led optimisé pour application automobile |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04192290A (ja) * | 1990-11-26 | 1992-07-10 | Sharp Corp | 薄膜el装置 |
WO2008001241A2 (fr) * | 2006-06-14 | 2008-01-03 | Philips Intellectual Property & Standards Gmbh | Diode électroluminescente organique structurée à micro-optique pour générer la lumière orientée |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6639360B2 (en) * | 2001-01-31 | 2003-10-28 | Gentex Corporation | High power radiation emitter device and heat dissipating package for electronic components |
ITUD20020059A1 (it) | 2002-03-12 | 2003-09-12 | Seima Italiana Spa | Dispositivo ottico di illuminazione e metodo di produzione di dispositivi di illuminazione o simili adottanti tale dispositivo |
DE20207799U1 (de) | 2002-05-17 | 2002-08-22 | FER Fahrzeugelektrik GmbH, 99817 Eisenach | Signalleuchte für Fahrzeuge |
JP4047186B2 (ja) * | 2003-02-10 | 2008-02-13 | 株式会社小糸製作所 | 車両用前照灯及び光学ユニット |
JP4002207B2 (ja) | 2003-04-21 | 2007-10-31 | 株式会社小糸製作所 | 車両用前照灯 |
JP4402425B2 (ja) | 2003-10-24 | 2010-01-20 | スタンレー電気株式会社 | 車両前照灯 |
DE102004063574A1 (de) * | 2004-12-30 | 2006-07-13 | Osram Opto Semiconductors Gmbh | Leuchtvorrichtung mit mehreren Halbleiterlichtquellen |
FR2913750A1 (fr) * | 2007-03-14 | 2008-09-19 | Valeo Vision Sa | Module optique pour projecteur de vehicule automobile |
DE102007018986A1 (de) | 2007-04-21 | 2008-10-23 | Hella Kgaa Hueck & Co. | Kraftfahrzeug- Innenraumbeleuchtungsvorrichtung |
DE102007018985A1 (de) | 2007-04-21 | 2008-10-23 | Hella Kgaa Hueck & Co. | Beleuchtungsvorrichtung für Fahrzeuge |
JP5024206B2 (ja) * | 2008-07-14 | 2012-09-12 | 市光工業株式会社 | 車両用灯具 |
-
2010
- 2010-01-26 FR FR1050489A patent/FR2955538B1/fr active Active
-
2011
- 2011-01-21 EP EP11701500A patent/EP2529149A1/fr active Pending
- 2011-01-21 US US13/574,915 patent/US9441805B2/en active Active
- 2011-01-21 WO PCT/EP2011/050849 patent/WO2011092121A1/fr active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04192290A (ja) * | 1990-11-26 | 1992-07-10 | Sharp Corp | 薄膜el装置 |
WO2008001241A2 (fr) * | 2006-06-14 | 2008-01-03 | Philips Intellectual Property & Standards Gmbh | Diode électroluminescente organique structurée à micro-optique pour générer la lumière orientée |
Non-Patent Citations (1)
Title |
---|
See also references of WO2011092121A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2011092121A1 (fr) | 2011-08-04 |
FR2955538A1 (fr) | 2011-07-29 |
FR2955538B1 (fr) | 2015-08-21 |
US9441805B2 (en) | 2016-09-13 |
US20130021813A1 (en) | 2013-01-24 |
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