EP4264123A1 - Dispositif lumineux bi-fonction avec lentille rotative - Google Patents
Dispositif lumineux bi-fonction avec lentille rotativeInfo
- Publication number
- EP4264123A1 EP4264123A1 EP21854808.9A EP21854808A EP4264123A1 EP 4264123 A1 EP4264123 A1 EP 4264123A1 EP 21854808 A EP21854808 A EP 21854808A EP 4264123 A1 EP4264123 A1 EP 4264123A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- light beam
- optical system
- optical
- luminous device
- 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 claims abstract description 83
- 238000003384 imaging method Methods 0.000 claims abstract description 3
- 238000009792 diffusion process Methods 0.000 claims description 5
- 230000011664 signaling Effects 0.000 claims description 5
- 230000006870 function Effects 0.000 description 39
- 230000009131 signaling function Effects 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 2
- 239000004697 Polyetherimide Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012994 photoredox catalyst Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229920001059 synthetic polymer Polymers 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
- F21S41/20—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
- 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]
- F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
- F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
-
- 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
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
-
- 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
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
- F21S41/635—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by moving refractors, filters or transparent cover plates
-
- 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
- F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
-
- 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
- F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
- F21W2102/155—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions having inclined and horizontal cutoff lines
-
- 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]
Definitions
- the invention relates to the field of lighting and light signaling, in particular for motor vehicles.
- Such a light module conventionally comprises a collector with a reflective surface of revolution with an elliptical profile, in the shape of a cap in a half-space delimited by a horizontal plane.
- An essentially point-like light source, of the light-emitting diode type is located at a first focal point of the reflecting surface and illuminates in the half-space in the direction of said surface. The rays are thus reflected in a convergent manner towards a second focal point of the reflecting surface.
- Another, generally flat, reflective surface with a cut-off edge at the second focal point provides upward reflection of rays which do not pass precisely through the second focal point, these rays then being refracted by a thick lens towards the bottom of the beam lighting.
- This reflective surface is commonly referred to as a "bender” in that it "bends" up the projection lens the rays that would otherwise form a top portion of the illumination beam.
- Such a light module has the disadvantage of requiring significant precision in the positioning of the folder and the cutting edge.
- the projection lens must be a thick lens due to its short focal length, which increases its weight and complicates its production, such as shrinkage defects in particular.
- the collector has a certain height and, therefore, a certain overall height.
- the published patent document WO 2020/025171 A1 discloses a light module, in particular for a motor vehicle, comprising a collector with a reflecting surface collecting and reflecting the light rays emitted by a light source into a light beam, similar to a light module with folding machine.
- the light module also includes a projection optical system, such as a lens, specifically configured to project the light beam in question by forming an image of the reflective surface of the collector.
- the projection optical system has a focus located on the reflecting surface, for example at a rear edge of the latter, so as to correctly image said edge and form a cut sharp in the projected light beam.
- This type of light module has the advantages of compactness, in particular in height, and simplicity of construction. They can be combined to form different light beams adding together.
- the object of the invention is to overcome at least one of the drawbacks of the aforementioned state of the art. More particularly, the aim of the invention is to propose a lighting device which integrates a maximum of lighting functions.
- the invention relates to a light device for a motor vehicle, comprising one or more light sources capable of emitting light rays; one or more collectors, each with a reflective surface configured to collect and reflect the light rays emitted by the or more light sources, referred to as reflected light rays, into a reflected light beam along an optical axis; an optical system comprising a projection lens performing a first optical function performing the projection of at least the majority of the reflected light beam into a projected light beam by imaging a part of the or each reflecting surface located, along a general direction of propagation of the light beam, at the rear of the or each corresponding light source; remarkable in that the optical system comprises an additional part separate from the projection lens and performing a second optical function performing a diffusion of at least the majority of the reflected light beam into a diffused light beam, said optical system being rotatable around an axis of rotation between a first position where the first function is active and a second position where the second function is active.
- the collector may be a concave reflector.
- At least some of the reflected rays have angles of inclination with respect to the optical axis which are less than or equal to 10°. This makes it possible to be in the so-called Gaussian conditions, thus allowing stigmatism.
- the additional part is formed by one or more diffusing screens, the or each diffusing screen being crossed by at least the majority of the reflected light beam when the optical system is in the second position, F at least a majority of the reflected light beam being diffused after passing through said screen to form the diffused light beam.
- the projection lens has a focal zone located on the reflecting surface of the or each of the corresponding collectors, at a rear edge of said reflecting surface. This simply makes it possible to image the part of the part of the reflective surface located behind the light source.
- the focal zone is located at a rear edge of said reflective surface.
- this focal zone can be a focal point, also called a focal point, or can be a focal line, also called a line of focal points.
- the optical system comprises an optical part comprising the projection lens and the additional part, the light device comprising a mechanism for rotating said optical part around the axis of rotation.
- said optical part is a transparent part.
- the optical part comprises a first input face and a first output face associated with the first input face, corresponding to the projection lens, and a second output face. entry and a second exit face associated with the second entry face, corresponding to the additional part, the first and second entry faces and/or the first and second exit faces being angularly offset around the axis of rotation at an angle between 60° and 120°.
- the second exit face has an average height, perpendicular to the axis of rotation, greater than an average height, perpendicular to the axis of rotation, of the first exit face.
- the first exit face has an average height, perpendicular to the axis of rotation, of less than 10 mm.
- the first input face in the first position of the optical system, is positioned opposite the one or more collectors, and in the second position, the second input face The input is positioned opposite the one or more collectors.
- the axis of rotation of the optical system is transverse to the optical axis and horizontal when the light device is in the operational position.
- the optical part is elongated along the axis of rotation.
- the rotation of the optical system between the first and second functions has an angular amplitude of between 60° and 120°.
- the light beam projected in the first position of the optical system is an illuminating beam and the light beam diffused in the second position of the optical system is a signaling beam or a light signature.
- a light signature is a light beam having an aesthetic light function that would identify the model and/or brand of vehicle in all circumstances.
- the light device comprises several light sources and several collectors with several reflective surfaces so as to form several reflected light beams which add up, and in which the optical system is rotatable between the first position wherein the projection lens receives at least a majority of said reflected light beams and a second position where the additional portion receives at least a majority of said reflected light beams.
- each of F at least one light source, F at least one collector and F at least one reflective surface is multiple so as to form, selectively, several light beams which are added together.
- the multiple collectors, reflective surfaces and light sources are arranged side by side.
- the first function of the optical system comprises a line of focus passing through the reflecting surfaces, more advantageously through the rear edges of said reflecting surfaces, or between said reflecting surfaces and the corresponding light sources.
- the second function of said optical system forms a light beam from light rays emitted by one or more auxiliary light sources.
- the measures of the invention are interesting in that they make it possible to integrate at least one additional light function into a luminous lighting device, and this without really increasing the necessary volume.
- the light sources present in the device for the lighting function(s) can be used for the additional function.
- FIG. 1 is a perspective view of a light device according to the invention, said device comprising an optical system
- FIG.2 is a schematic representation, in longitudinal section, of the light device of [fig.l] when the optical system is in a first position;
- FIG.3 is a schematic representation, in longitudinal section, of the light device of [fig.l] when the optical system is in a second position.
- FIGS 1 to 3 illustrate an embodiment of the invention.
- [fig.l] is a perspective view of a light device according to the invention.
- the light device 2 is, here, a selectively lighting and signaling device, as will be detailed below.
- the light device 2 comprises a housing 4 can itself be made up of a series of components or housing portions, assembled to each other.
- the housing 4 comprises several optical cavities with light sources 6.1, 6.2, 6.3 and reflective surfaces 8.1, 8.2 and 8.3. Each of the reflective surfaces 8.1, 8.2 and 8.3, associated with a light source, forms a unit capable of producing a light beam.
- the light device also comprises an optical system 10 capable of receiving and shaping the light beams in question.
- the optical system 10 comprises an optical part 12 with a dual function, namely a first optical projection function and a second optical light scattering function.
- the optical part 12 is rotatably mounted around an axis of rotation 14 so as to activate, selectively, one or the other of the first and second functions.
- the light device 2 comprises a mechanism 16 for rotating said optical part 12 about the axis of rotation 14. This mechanism may comprise an electric motor coupled to a bevel gear mechanism itself coupled to the optical part .
- the second light diffusion function is activated, meaning that the light beams produced by the light sources and associated reflective surfaces will be diffused with a view to provide a signaling function.
- Figures 2 and 3 illustrate schematically and in longitudinal section the light device of [fig.l] in the first and second functions, respectively. More specifically, these figures illustrate a single light source and a single reflective surface associated with the light source, it being understood that they apply to each of the light sources and associated reflective surfaces.
- the [fig.2] illustrates the light device 2 when the optical device is in the first position where the first optical function of projecting the light beam is active.
- the optical part 12 comprises a first portion 12.1 corresponding to the first function and a second portion 12.2 corresponding to the second function.
- the first portion 12.1 of the optical part 12 is active by being placed opposite the light rays emitted by the light source 6 and reflected by the reflecting surface 8, while the second portion 12.2 is inactive by being placed at a distance rays in question.
- these two portions each have a generally elongated cross section, these two cross sections forming an elbow with an angle close to the order of 90°, advantageously between 70° and 100°.
- These cross sections have in principle different geometries given their different optical functions.
- the first portion 12.1 of the optical part 12, ensuring the first shape function a projection lens with an entrance face 12.1.1 and an entrance face 12.1.2.
- This lens can in particular be of the plano-convex or biconvex type.
- the second portion 12.2 of the optical part 12, ensuring the second function also comprises an input face 12.2 1 and an output face 12.2.2.
- the first portion 12.1 is formed by a projection lens while the second portion 12.2 is here formed by an additional part separate from the projection lens.
- the light source 6 is advantageously of the semiconductor type, such as in particular an electroluminescent diode.
- the light source 6 emits light rays in a half-space delimited by the main plane of said source, according to the example shown, in a main direction perpendicular to said plane and to the optical axis 18.
- the direction principal emission may be between 65° and 115° with respect to the optical axis 18.
- a collector 20 forms a support in the form of a shell or cap, on the inner face of which is applied the reflective surface 8.
- the reflective surface 8 advantageously has a profile of the elliptical or parabolic type. It is advantageously a surface of revolution around an axis parallel to the optical axis. Alternatively, it can be a free-form surface or a swept surface or an asymmetrical surface. It can also include several sectors.
- the collector 20 in the form of a shell or cap is advantageously made of materials having good heat resistance, for example glass or synthetic polymers such as polycarbonate PC or polyetherimide PEL
- the expression “parabolic type” applies generally to reflectors whose surface has a single focal point, that is to say a zone of convergence of the light rays such that the light rays emitted by a light source placed at the level of this zone of convergence are projected at large distance after reflection on the surface. Projected at a great distance means that these light rays do not converge on an area located at least 10 times the dimensions of the reflector.
- the reflected rays do not converge towards a convergence zone or, if they do converge, this convergence zone is located at a distance greater than or equal to 10 times the dimensions of the reflector.
- a parabolic-type surface may therefore have parabolic portions or not.
- a reflector having such a surface is generally used alone to create a light beam. Alternatively it can be used as a projection surface associated with an elliptical-type reflector. In this case, the light source of the parabolic-type reflector is the convergence zone of the rays reflected by the elliptical-type reflector.
- the light source 6 is arranged at a focus of the reflective surface 8 of so that its rays are collected and reflected along the optical axis, said rays, said reflected rays, forming a reflected light beam. At least some of these reflected rays have angles of inclination a in a vertical plane with respect to said axis which are less than or equal to 25°, preferably less than or equal to 10°, so as to be under the conditions known as Gauss, making it possible to obtain a stigma, that is to say a sharpness of the projected image. These are advantageously the rays reflected by the rear part of the reflecting surface 8.
- the first portion 12.1 of the optical part 12, forming the projection lens has a focus 12.1.3 which is located along the optical axis 18, at the level of the light source 6 or even behind said source.
- the focus 12.1.3 is located on the reflective surface 8, at a rear edge, here also the lower edge, thereof. It should be noted that it is also possible for this focus to be located at the rear or at the front of the reflective surface 8, preferably close, in particular less than 10 mm, preferably less than 5 mm.
- the reflective surface 8 if it is of the elliptical type, has a second focus located at the front of the lens 12.1 and at a distance from the optical axis 18. It should be noted that it is also possible that this focus is located at the rear of the lens and/or on the optical axis, preferably close to the lens, so as to reduce the width of the beam at the level of the entrance face of the lens.
- the first portion 12.1 described is configured to project at least the majority of the reflected light beam into a projected light beam performing a lighting light function.
- the [fig.3] illustrates the light device 2 when the optical device is in the second position where the second optical function of diffusion of the light beam is active.
- the optical part has undergone a rotation around its axis of rotation 14 of the order of 90°, in this case in the anti-clockwise direction, so as to make the first portion 12.1 inactive and the second portion 12.2 active.
- the input face 12.2.1 of the second portion 12.2 intersects with the optical axis 18 and is located opposite the reflecting surface 8 and the light source 6, so to collect the light beam produced by the latter, also called reflected light beam.
- At least one of the input 12.2.1 and output 12.2.2 faces may have a rough or grained surface so as to provide a light diffusion function.
- the second portion 12.2 is configured to project at least the majority of the reflected light beam into a diffusing light beam which here performs a signaling light function.
- the input face 12.2.1 of the second portion 12.2 of the optical part 12 is at a distance from the reflecting surface 8 potentially different from that of the input face 12.1.1 of the first portion 12.1 (when the latter is in the active position).
- the function of the second function of the optical system is not to image the reflective surface 8 illuminated by the light source 6 like the first function.
- the second function consists in diffusing the light in order to perform a signaling function.
- the input face 12.2.1 of the second portion 12.2 is higher (in a direction perpendicular to the optical axis when the function is active) than the input face 12.1.1 of the first portion 12.1, allowing it to collect more rays reflected by the reflective surface 8.
- auxiliary light sources for the second function, that is to say inactive for the first function.
- the second function described above can for example be a signaling function which is not necessary when the motor vehicle is in motion. This may in particular be a function of the position light or lantern type, or even a light signature, activated when the vehicle is parked or stationary for an extended period.
- the optical system 10 can be common to several collectors, reflective surfaces and associated light sources, arranged side by side.
- the first function can then present not a point focus but a line of focus passing through the rear parts of the reflective surfaces in question.
- the focus line in question may not be straight, in this case slightly curved.
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 |
---|---|---|---|
FR2013753A FR3118127B1 (fr) | 2020-12-18 | 2020-12-18 | Dispositif lumineux bi-fonction avec lentille rotative |
PCT/EP2021/086330 WO2022129427A1 (fr) | 2020-12-18 | 2021-12-16 | Dispositif lumineux bi-fonction avec lentille rotative |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4264123A1 true EP4264123A1 (fr) | 2023-10-25 |
Family
ID=74554137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21854808.9A Pending EP4264123A1 (fr) | 2020-12-18 | 2021-12-16 | Dispositif lumineux bi-fonction avec lentille rotative |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4264123A1 (fr) |
CN (1) | CN116648579A (fr) |
FR (1) | FR3118127B1 (fr) |
WO (1) | WO2022129427A1 (fr) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996016294A1 (fr) * | 1994-11-17 | 1996-05-30 | Cunningham, David, W. | Piece d'eclairage comprenant un dispositif d'etalement du faisceau a effet de zoom |
DE102004002280A1 (de) * | 2004-01-16 | 2005-08-25 | Automotive Lighting Reutlingen Gmbh | Scheinwerferanordnung |
KR101054662B1 (ko) * | 2004-12-17 | 2011-08-08 | 현대자동차주식회사 | 차속 감지형 능동 등화장치 |
FR3016567B1 (fr) * | 2014-01-17 | 2016-01-29 | Peugeot Citroen Automobiles Sa | Dispositif d'eclairage reversible pour vehicule automobile |
JP2016115582A (ja) * | 2014-12-16 | 2016-06-23 | 株式会社小糸製作所 | 配光デバイスを備えた車両用灯具 |
FR3084728B1 (fr) | 2018-07-31 | 2021-03-19 | Valeo Vision | Module lumineux imageant la surface eclairee d'un collecteur |
CN111486404B (zh) * | 2020-04-17 | 2022-04-26 | 东风汽车有限公司 | 前组合车灯 |
-
2020
- 2020-12-18 FR FR2013753A patent/FR3118127B1/fr active Active
-
2021
- 2021-12-16 CN CN202180083938.2A patent/CN116648579A/zh active Pending
- 2021-12-16 EP EP21854808.9A patent/EP4264123A1/fr active Pending
- 2021-12-16 WO PCT/EP2021/086330 patent/WO2022129427A1/fr active Application Filing
Also Published As
Publication number | Publication date |
---|---|
FR3118127A1 (fr) | 2022-06-24 |
CN116648579A (zh) | 2023-08-25 |
WO2022129427A1 (fr) | 2022-06-23 |
FR3118127B1 (fr) | 2022-12-16 |
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