EP3628914B1 - Optical unit with dual signalling and lighting function - Google Patents
Optical unit with dual signalling and lighting function Download PDFInfo
- Publication number
- EP3628914B1 EP3628914B1 EP19198118.2A EP19198118A EP3628914B1 EP 3628914 B1 EP3628914 B1 EP 3628914B1 EP 19198118 A EP19198118 A EP 19198118A EP 3628914 B1 EP3628914 B1 EP 3628914B1
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- European Patent Office
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- cut
- optical
- dioptre
- optical unit
- piece
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- 230000011664 signaling Effects 0.000 title claims description 11
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Images
Classifications
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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
- F21S41/24—Light guides
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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
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/322—Optical layout thereof the reflector using total internal reflection
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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
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
- F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
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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
- F21S41/10—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
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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
- 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
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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
- F21W2103/00—Exterior vehicle lighting devices for signalling purposes
- F21W2103/55—Daytime running lights [DRL]
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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
- F21W2105/00—Combinations of lighting devices covered by codes F21W2102/00 – F21W2104/00
Definitions
- the present invention relates to the field of light devices, in particular for motor vehicles.
- optical modules making it possible, by means of a tilting cover, to perform a dipped beam or high beam function with the same light source and the same optical module.
- such modules require at least one actuator and one specific mechanical device.
- DRL Day Running Light
- the document FR3039883 describes a light module comprising a block of transparent or translucent material receiving several light beams and deflecting them so as to form, at the output of this block, a cut-off lighting beam.
- a light device equipped with such a light module must therefore be equipped with an additional light module to additionally produce a signaling beam, in particular a DRL.
- a light device containing these modules and therefore a vehicle equipped with this light device, has two distinct light signatures depending on whether they operate by day, with the lighting function, or at night, with the DRL.
- the technical problem which the invention aims to solve is therefore to produce an optical means for a luminous device, making it possible to reduce the size of said device and to carry out different luminous functions having the same luminous signature, and this without the need for mechanical means of transition from one function to another.
- the cut-off member is arranged so as to stop or reflect at least some of the rays reaching it from one side or the other.
- the first collimator is arranged so as to send the first light beam only on one side of the switching device, while the second collimator is arranged so as to send the second light beam on both sides of the switching device.
- the projection system, the first collimator, the second collimator and the cut-off member are arranged so as to project the first beam into a cut-off beam and to project the second beam into a cut-off beam.
- a cut-off beam and a non-cut-off beam can be projected from the same projection system.
- the cut-off beam can be a passing beam while the uncut beam can be a signaling beam. Consequently, the beams having different light functions have the same light signature. In other words, said beams, on leaving the same exit surface, have an identical illuminated appearance.
- the cut-off beam can be a dipped beam and the uncut beam can be a DRL, thus making it possible to obtain the same light signature day and night.
- the optical unit according to the invention has a projection system for two separate collimators.
- the optical unit occupies less space in the light device which contains it. Consequently, the luminous device can have a reduced volume, therefore be more compact compared to the device of the state of the art.
- the optical unit comprises a first optical part and a second optical part, the first optical part comprising the first collimator and the second optical part comprising the second collimator and the first optical part comprises a portion in relief and the second optical part comprises a recess having a shape substantially complementary to the shape of the raised portion of the first part so that the raised portion fits into the recess; thus, the optical unit, composed of the first optical part and the second optical part, becomes more compact.
- the invention also relates to a light device for a motor vehicle, in particular a vehicle headlamp, comprising an optical unit according to the invention.
- the light device also includes the light sources emitting the first and the second light beam. These light sources can in particular be light-emitting diodes, also called LEDs (for Light-Emitting Diode in English).
- the light device according to the invention may further comprise a casing in which said optical unit is housed.
- the internal face of the casing is coated with a metal layer.
- the metal layer may be an aluminum layer deposited on the internal face of the case by an aluminating process.
- the metal layer makes it possible to improve the homogeneity of the light beam generated by the optical unit, in particular of the signaling beam. Beam quality is improved.
- the internal face of the box can be coated with a layer of white color, in particular with white paint, for the same result as a metallic layer.
- the terms “front”, “rear”, “lower”, “upper”, “top”, “bottom”, “transverse”, “longitudinal”, “horizontal”, as well as their gender or number, refer to the direction of light emission out of the optical unit as it is intended to be positioned in the light device mounted in the vehicle.
- the terms “upstream” and “downstream” refer to the direction of light propagation within the optical unit.
- the vertical direction is represented by the Z axis illustrated on the figures 1 to 8 , 11 and 12 .
- the Y axis represents a transverse or lateral direction.
- the X axis represents the longitudinal direction, here along which the light is emitted out of the optical unit.
- front and rear are defined primarily with respect to this X axis.
- the horizontal designates all orientations which belong to or which are parallel to a plane passing through the X axis and the Y axis illustrated in the figures below.
- figures 1 to 8 , 11 and 12 The figures 1 to 8 illustrate an embodiment of an optical unit 1 according to the invention.
- the optical unit 1 comprises a first optical part 10, here formed from a single block of transparent or translucent material, for example obtained by molding.
- the optical unit 1 further comprises a second optical part 20, here also formed from a single block of transparent or translucent material.
- the first and second optical parts 10 and 20 can be made from polycarbonate (PC) or polymethyl methacrylate (PMMA).
- the second optical part 20 rests on a rear face 13 of the first optical part 10.
- the first optical part 10 comprises several collimators 11, called first collimators 11, opposite each of which is positioned a light source, hereinafter called first light source 12.
- a first light source 12 is placed opposite the entrance diopter of a first collimator 11, so that the light beam from this source 12, hereinafter called the first beam F1, enters the first optical part 10 through this input interface. In particular the majority, or even all of these light rays, enters the block of the first optical part 10 through this input diopter.
- the entry point of the first collimator 11 is also called the primary entry point.
- the second optical part 20 also comprises a collimator 21, called second collimator 21, in front of which are positioned several light sources, hereinafter called second light sources 22.
- FIG 7 and 8 only one of the second light sources 22 is shown. It is placed, like the other second light sources 22, facing the input diopter of the second collimator 21 so that the light beam from this source 22, hereinafter called the second beam F2, enters the second optical part 20 through this input interface. In particular the majority, or even all of these light rays, enters the block of the second optical part 20 through this input diopter.
- the first optical part 10 comprises several collimators 11 forming protuberances projecting from a body 15 of said first part 10.
- the first collimators 11 are placed one beside the other so as to form a row.
- the first light sources 12 are also arranged in a row opposite the first collimators 11.
- the second optical part 20 comprises a single collimator 21 which here extends along the width of said second part.
- the width is the dimension of the part defined along the Y axis.
- the second collimator 21 is a notch 29 made on a lower face 23 of the second optical part 20.
- the second light sources 22 are arranged in a row along the extent of the notch 29.
- first and second optical parts 10 and 20 are positioned relative to each other so that the first and second light sources 12, 22 can be positioned in the same flat support, such as on a heatsink top surface, or as here, on a planar printed circuit board.
- the main body 15 of the first optical part 10 extends between a first end 15a and a second end 15b.
- the first collimators 11 are arranged at the end of the first end 15a.
- the first optical part 10 comprises a projection portion 4, forming a projection system 4 joined in one piece with the second end 15b.
- the body main 15 and the projection portion 4 here form the block of the first optical part 10.
- the main body 15 includes a switch member 3 located between the ends 15a and 15b.
- the cut-off member 3 is a cut-off dioptre 32.
- the cut-off interface 32 is located in an upper portion of the body 15, and in particular close to the second end 15b of said body. In other examples, the cut-off interface 32 can be located in a lower portion of the body 15, in particular closer to the first end 15a.
- cut-off diopter 32 comprises an internal face 321.
- the latter operates in total internal reflection so as to send the light rays of the first beam F1 which reach it towards the projection portion 4.
- the cut-off diopter 32 is limited downstream by a cut-off edge 31 forming the second end 15b of the main body 15.
- the projection portion 4 begins from the second end 15b, therefore from the cut edge 31.
- the projection portion 4 comprises a first portion 4a projecting rearwards so as to form a nose 43.
- This latter comprises a first face oriented towards the support of the light sources which is, here, the printed circuit board 8.
- This first face, forming a first secondary input diopter 51, is secant with the cut-off diopter 32 at the level of the cutting edge 31.
- the first portion 4a further comprises a second face located downstream and vis-à-vis the cut-off edge 31. Said second face forms a reference diopter 41 operating in total internal reflection so as to reflect the rays which reach it. to a terminal exit diopter 42.
- the terminal output dioptre 42 is part of the projection portion 4 and forms an output of the first optical part 10.
- the return diopter 41 and terminal output diopter 42 can form a converging system with a line or a focal surface, so that the cut-off edge 31 is arranged in this line or this surface. focal.
- the main body 15 further comprises a raised portion 6 placed, here behind, and between the first end 15a and the second end 15b.
- the raised portion 6 is located upstream of the cut edge 31.
- the raised portion 6 is located on the same side and upstream of the cut-off interface 32. Specifically, the raised portion 6 is located between the cut-off interface 32 and the first end 15a.
- the internal face of the raised portion 6 is in the extension of the internal face 321 of the cut-off interface 32 and extends as far as the first end 15a.
- the portion in relief 6 comprises an increasing section in the direction of the first end 15a. It comprises a lower base 52 forming a second secondary input interface 52 of the first optical part 10.
- the first optical part 10 comprises three different places where the light rays can enter said first optical part 10. Specifically, most of the first light beam F1 enters the first optical part 10 through dioptres of primary input of the first collimators 11. The light rays of the second light beam F2, for their part, enter the first optical part 10 through the first and second secondary input diopters 51 and 52. The detail of the path of these rays will be described later.
- the figures 4 and 5 respectively represent the front and the rear of the second optical part 20.
- the second optical part 20 comprises an upper face 24, located opposite the second collimator 21 in the Z direction.
- the upper face 24 forms a first intermediate exit interface 24.
- the second optical part 20 further comprises a hollow 7 having a shape complementary to that of the portion in relief 6 of the first optical part 10 so that the portion in relief 6 is housed in the hollow 7.
- the hollow 7 is made in a front face 23 of the second optical part 20.
- the hollow 7 comprises a bottom forming a second intermediate exit interface 26.
- the first intermediate output diopter 24 is placed opposite the first secondary input diopter 51 while the second intermediate output diopter 26 is placed opposite the second diopter d secondary entrance 52.
- the second optical part 20 is positioned in height relative to the first optical part 10 so that the first intermediate exit interface 24 is placed at an optimal distance from the first secondary input interface 51.
- This optimal distance allows the majority of the light rays leaving said first exit diopter 24 to enter the block of the first optical part 10 through the first intermediate entry diopter 24. In other words, this optimum distance makes it possible to limit losses of light rays when they pass from the second optical part 20 to the first optical part 10.
- Such a positioning of the optical parts 10 and 20, also called centering, is obtained in particular thanks to the fixing of each of these parts on the common support, here, the printed circuit board 8..
- the portion in relief 6 comprises a first primary side face 61 and a second primary side face 62.
- the hollow 7 also comprises two side faces including a first secondary side face 71 and a second secondary side face 72.
- provision may be made for the hollow not to include the side faces. This therefore makes it possible to simplify the manufacture of the hollow.
- the oblique arrangement of these side faces allows the first optical part 10 to rest on the side faces of the second optical part 20.
- the figure 7 schematically illustrates the path of the first light beam F1.
- the light rays arriving on the cut-off edge 31 are represented by arrows in broken line and whose tip ends in a triangle.
- the other rays are represented by arrows in a solid line, the tip of which ends in a triangle.
- the first collimator 11 Thanks to the arrangement of the first collimator 11, a part of the first beam F1 is sent directly towards the deflection diopter 41, which then reflects these rays towards the terminal exit diopter 42, from where these rays leave by refraction inclined towards the low with respect to the optical axis A of the optical unit 1.
- the first beam F1 forms a low portion C of an illuminating beam having a lower cut-off line C1, image of the cut-off edge 31.
- the lower cut-off line C1 is a relatively horizontal line on the left and with an oblique portion on the right.
- Said illuminating beam is shown in figure 9 , in projection on a vertical screen substantially perpendicular to the optical axis A, for example located at 25m.
- the light rays reflected by the cut-off diopter 32 are projected below the cut-off line C1.
- the cut-off interface 32 therefore indeed forms a bender for the first beam F1, from inside the first optical part 10.
- the figure 8 schematically illustrates the path of the second light beam F2.
- the light rays arriving on the cut-off edge 31 are represented by arrows in broken line and whose tip ends in a triangle.
- the other rays are represented by arrows in a solid line, the tip of which ends in a triangle.
- the second collimator 12 is arranged so as to allow entry of most of the second beam F2 at inside the second optical part 20 and to send the second beam F2 on both sides of the cutting edge 31.
- a first part 12 1 of the second beam F2 comprises light rays generally parallel to each other and which are sent towards the first intermediate output interface 24.
- Said first exit diopter 24 is arranged so as to send certain light rays from the first part 12 1 to the first intermediate entry diopter 51. These rays then reach the return diopter 41, which reflects these rays towards the exit diopter terminal 42, from which the rays leave by refraction inclined upwards with respect to the optical axis A.
- a second part 12 2 of the second beam F2 is sent to the second intermediate output interface 26 and enters by refraction into the first optical part 10 through the second intermediate input interface 52.
- the second part 12 2 of the second beam F2 first passes through the portion in relief 6.
- the latter therefore has, here, a function of guiding the light rays.
- Certain light rays from the second part 12 2 then reach the reference diopter 41, which reflects them towards the terminal output diopter 42, from where the rays leave by refraction inclined downwards with respect to the optical axis A.
- Some of the other light rays of the second part 12 2 are sent to the cut-off edge 31. Then, they respectively reach the reference diopter 41 and by reflection the terminal exit diopter 42, from where these rays leave by refraction parallel to the optical axis A.
- the second beam F2 forms a signaling beam F s as illustrated in figure 10 , such as a beam having a daytime running light function.
- This beam comprises a low portion C3 and a high portion C4.
- the lower portion C3 is generated from the rays of the second beam passing through the second intermediate output interface 26 and through the second secondary input interface 52. In addition, these rays pass through a first side, here, in front, of the cutting edge 31.
- the upper portion C4 is generated from the rays of the second beam passing through the first intermediate exit interface 24 and through the first secondary entry interface 51. As illustrated in the figure 8 , these rays pass through a second side, here behind the cut-off edge 31.
- the second beam F2 is sent towards both sides of the cut-off edge 31, which makes it possible to generate a portion high and a low portion together forming a signaling beam.
- the second optical part 20 distributes the second light beam F2 so that part of said beam is sent forward and another part behind the cut-off edge 31.
- Such a distribution is combined with the arrangement of the projection system 4, integrated in the first optical part 10, to create an uncut beam whose light signature is the same as the cut-off beam generated by the first optical part 10 in conjunction with the first light source 12.
- the cut-off line is not visible in the signaling beam F s .
- the optical unit 1 is mounted on a radiator 30 which makes it possible to dissipate the heat given off by the light sources 21, 22.
- the radiator 30 comprises fixing members intended to cooperate with fixing members of a casing 9, as illustrated in the figure 12 .
- the casing 9 includes an opening 91 arranged opposite the terminal outlet dioptre 42 when the casing 9 is mounted on the radiator.
- the shape of the opening is similar to that of the outline of the terminal exit diopter 42.
- the casing 9 comprises an internal face 90 covered with a metallic coating.
- the metallic coating can be a thin layer of aluminium.
- This metallic coating makes it possible to obtain uniform illumination of the light beam, in particular of the signaling beam generated by the optical unit 1.
- the metallic coating can be replaced by a white colored coating to also obtain homogeneous illumination.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Description
La présente invention se rapporte au domaine des dispositifs lumineux, notamment de véhicule automobile.The present invention relates to the field of light devices, in particular for motor vehicles.
De manière connue, dans les dispositifs lumineux pour véhicule automobile, les faisceaux lumineux ayant des fonctions lumineuses différentes sont souvent réalisés par des modules optiques différents. Des modules optiques pour véhicule automobile sont divulgués dans les documents
En ce qui concerne les fonctions d'éclairage, il existe, néanmoins, des modules optiques permettant, grâce à un cache basculant, de réaliser une fonction de feu de croisement ou de feu route avec la même source lumineuse et le même module optique. Cependant, de tels modules nécessitent au moins un actionneur et un dispositif mécanique spécifique.As far as the lighting functions are concerned, there are, however, optical modules making it possible, by means of a tilting cover, to perform a dipped beam or high beam function with the same light source and the same optical module. However, such modules require at least one actuator and one specific mechanical device.
En ce qui concerne les fonctions de signalisation, ces dernières sont souvent réalisées par des modules distincts des modules générant les faisceaux d'éclairage. C'est notamment le cas de la fonction de feu de position diurne, encore appelée DRL (pour « Day Running Light » en langue anglaise).As regards the signaling functions, these are often carried out by modules separate from the modules generating the lighting beams. This is particularly the case of the daytime running light function, also called DRL (for “Day Running Light” in English).
Ainsi, le document
Il en résulte qu'un dispositif lumineux contenant ces modules, et donc un véhicule équipé de ce dispositif lumineux, présentent deux signatures lumineuses distinctes selon qu'ils fonctionnent de jour, avec la fonction d'éclairage, ou de nuit, avec le DRL.As a result, a light device containing these modules, and therefore a vehicle equipped with this light device, has two distinct light signatures depending on whether they operate by day, with the lighting function, or at night, with the DRL.
Or il peut être souhaité de réaliser une même signature lumineuse de jour, comme de nuit.However, it may be desired to achieve the same light signature day and night.
Par ailleurs, il faut donc concevoir le dispositif lumineux avec un volume suffisant pour pouvoir contenir les différents modules optiques. Un tel dispositif lumineux peut être encombrant et difficile d'être installé dans des espaces restreints qu'offre notamment un véhicule automobile citadin.Furthermore, it is therefore necessary to design the light device with a sufficient volume to be able to contain the various optical modules. Such a light device can be bulky and difficult to install in the restricted spaces offered in particular by a city motor vehicle.
Le problème technique que vise à résoudre l'invention est donc de réaliser un moyen optique pour dispositif lumineux, permettant de réduire l'encombrement dudit dispositif et de réaliser différentes fonctions lumineuses ayant la même signature lumineuse, et ce sans avoir besoin des moyens mécaniques de passage d'une fonction à l'autre.The technical problem which the invention aims to solve is therefore to produce an optical means for a luminous device, making it possible to reduce the size of said device and to carry out different luminous functions having the same luminous signature, and this without the need for mechanical means of transition from one function to another.
A cet effet, un premier objet de l'invention est une unité optique telle que définie dans la revendication 1. L'unité optique comprend:
- un premier collimateur destiné à recevoir un premier faisceau lumineux émis par une première source de lumière ;
- un deuxième collimateur destiné à recevoir un deuxième faisceau lumineux émis par une deuxième source de lumière ;
- un organe de coupure; et
- un système de projection.
- a first collimator intended to receive a first light beam emitted by a first light source;
- a second collimator intended to receive a second light beam emitted by a second light source;
- a cut-off member; and
- a projection system.
Selon l'invention, l'organe de coupure est agencé de manière à arrêter ou réfléchir au moins une partie des rayons l'atteignant d'un côté ou de l'autre. Le premier collimateur est agencé de manière à envoyer le premier faisceau lumineux uniquement d'un côté de l'organe de coupure, tandis que le deuxième collimateur est agencé de manière à envoyer le deuxième faisceau lumineux des deux côtés de l'organe de coupure. En outre, le système de projection, le premier collimateur, le deuxième collimateur et l'organe de coupure sont agencés de manière à projeter le premier faisceau en un faisceau à coupure et à projeter le deuxième faisceau en un faisceau sans coupure.According to the invention, the cut-off member is arranged so as to stop or reflect at least some of the rays reaching it from one side or the other. The first collimator is arranged so as to send the first light beam only on one side of the switching device, while the second collimator is arranged so as to send the second light beam on both sides of the switching device. Furthermore, the projection system, the first collimator, the second collimator and the cut-off member are arranged so as to project the first beam into a cut-off beam and to project the second beam into a cut-off beam.
Ainsi, grâce à l'unité optique selon l'invention, un faisceau à coupure et un faisceau sans coupure peuvent être projetés à partir d'un même système de projection. A titre d'exemple, le faisceau à coupure peut être un faisceau de croisement tandis que le faisceau sans coupure peut être un faisceau de signalisation. Par conséquent, les faisceaux ayant des fonctions lumineuses différentes ont une même signature lumineuse. Autrement dit, lesdits faisceaux, en sortant d'une même surface de sortie, présentent un aspect allumé identique.Thus, thanks to the optical unit according to the invention, a cut-off beam and a non-cut-off beam can be projected from the same projection system. As for example, the cut-off beam can be a passing beam while the uncut beam can be a signaling beam. Consequently, the beams having different light functions have the same light signature. In other words, said beams, on leaving the same exit surface, have an identical illuminated appearance.
Notamment, le faisceau à coupure peut être un faisceau de croisement et le faisceau sans coupure peut être un DRL, permettant ainsi d'obtenir une même signature lumineuse de jour, comme de nuit.In particular, the cut-off beam can be a dipped beam and the uncut beam can be a DRL, thus making it possible to obtain the same light signature day and night.
Par ailleurs, l'unité optique selon l'invention dispose d'un système de projection pour deux collimateurs distincts. Ainsi, l'unité optique, avec le nombre réduit de composants optiques, occupe moins d'espace dans le dispositif lumineux qui la contient. Par conséquent, le dispositif lumineux peut avoir un volume réduit, donc être plus compact par rapport au dispositif de l'état de l'art.Furthermore, the optical unit according to the invention has a projection system for two separate collimators. Thus, the optical unit, with the reduced number of optical components, occupies less space in the light device which contains it. Consequently, the luminous device can have a reduced volume, therefore be more compact compared to the device of the state of the art.
Par ailleurs, on s'affranchit d'actionneur et d'un mécanisme pour passer d'un faisceau à l'autre, puisque c'est l'allumage ou l'extinction de l'une des sources de lumière qui permet de passer d'une fonction à l'autre.Furthermore, we do away with an actuator and a mechanism to switch from one beam to another, since it is the switching on or off of one of the light sources which makes it possible to switch from one beam to another. one function to another.
Selon l'invention, l'unité optique comprend une première pièce optique et une deuxième pièce optique, la première pièce optique comprenant le premier collimateur et la deuxième pièce optique comprenant le deuxième collimateur et la première pièce optique comprend une portion en relief et la deuxième pièce optique comprend un creux présentant une forme sensiblement complémentaire à la forme de la portion en relief de la première pièce de manière à ce que la portion en relief se loge dans le creux; ainsi, l'unité optique, composée de la première pièce optique et de la deuxième pièce optique, devient plus compacte.According to the invention, the optical unit comprises a first optical part and a second optical part, the first optical part comprising the first collimator and the second optical part comprising the second collimator and the first optical part comprises a portion in relief and the second optical part comprises a recess having a shape substantially complementary to the shape of the raised portion of the first part so that the raised portion fits into the recess; thus, the optical unit, composed of the first optical part and the second optical part, becomes more compact.
L'unité optique selon l'invention peut optionnellement comprendre une ou plusieurs des caractéristiques suivantes :
- l'organe de coupure est limité en aval par un bord de coupure, le système de projection étant agencé avec l'organe de coupure de manière à projeter l'image du bord de coupure, de manière à ce que cette image forme une ligne de coupure dans le faisceau à coupure; autrement dit, le système de projection est agencé d'une part en aval du bord de coupure de manière à recevoir le premier et le deuxième faisceaux après leur passage sur ce bord de coupure et d'autre part, de manière à projeter en sortie de l'unité optique une image du bord de coupure ;
- la première pièce optique comprend en outre le système de projection ; cela permet de réduire le nombre de pièces distinctes de l'unité optique et donc de simplifier la réalisation de celle-ci ; en outre, l'intégration du système de projection dans la première pièce optique permet d'augmenter la précision dans la direction des rayons lumineux dans la première pièce optique, car le positionnement entre le système de projection et la première pièce optique est réalisé dès la fabrication, notamment par moulage de la première pièce; l'erreur de positionnement entre ces deux pièces est donc faible, voire inexistant ;
- le système de projection comprend :
- o un dioptre de renvoi situé en aval et en vis-à-vis du bord de coupure, et
- o un dioptre de sortie terminal formant une sortie de la première pièce optique, le dioptre de renvoi étant agencé de manière à réfléchir le premier faisceau et le deuxième faisceau vers ce dioptre de sortie terminal,
- la première pièce optique comprend une surface comprenant un dioptre de coupure délimité en aval par le bord de coupure et formant ledit organe de coupure, le dioptre de coupure étant agencé de manière à réfléchir le premier et le deuxième faisceaux ; à titre d'exemple, le dioptre de coupure fonctionne en réflexion interne totale ;
- la première pièce optique comprend un premier dioptre d'entrée secondaire se joignant avec le dioptre de coupure au bord de coupure ; ici, le premier dioptre d'entrée secondaire est distinct du dioptre d'entrée du premier collimateur, dit dioptre d'entrée primaire ; en outre, le premier dioptre d'entrée secondaire est au même niveau que le bord de coupure selon le sens de propagation de la lumière de l'amont vers l'aval dans la première pièce optique ;
- la deuxième pièce optique comprend un premier dioptre de sortie intermédiaire ;
- selon l'alinéa précédent, la deuxième pièce optique et la première pièce optique sont agencées l'une par rapport à l'autre de manière à ce que ledit premier dioptre de sortie intermédiaire soit disposé en vis-à-vis dudit premier dioptre d'entrée secondaire, de manière à ce qu'une première partie du deuxième faisceau sorte de la deuxième pièce optique par le premier dioptre de sortie intermédiaire et entre dans la première pièce optique par le premier dioptre d'entrée secondaire, de sorte que cette première partie du deuxième faisceau passe d'un premier côté du bord de coupure ;
- la première pièce optique comprend un deuxième dioptre d'entrée secondaire ;
- selon l'alinéa précédent, la deuxième pièce optique comprend un deuxième dioptre de sortie intermédiaire, et
o la première pièce optique et la deuxième pièce optique sont agencées l'une par rapport à l'autre de manière à ce que ledit deuxième dioptre d'entrée secondaire soit disposé en vis-à-vis dudit deuxième dioptre de sortie intermédiaire, de manière à ce qu'une deuxième partie du deuxième faisceau sorte de la deuxième pièce optique par le deuxième dioptre de sortie intermédiaire et entre dans la première pièce optique par le deuxième dioptre d'entrée secondaire, de sorte que cette deuxième partie du deuxième faisceau passe d'un deuxième côté du bord de coupure ; - la portion en relief de la première pièce optique comprend une face formant le deuxième dioptre d'entrée secondaire;
- selon l'alinéa précédent, le creux de la deuxième pièce optique comprend une face formant le deuxième dioptre de sortie intermédiaire ; on exploite donc astucieusement les faces disponibles de la portion en relief et du creux pour en faire des surfaces optiques actives ; cela permet donc de simplifier la configuration de l'unité optique dans son ensemble ;
- la portion en relief comprend une première face latérale primaire et une deuxième face latérale primaire;
- selon l'alinéa précédent, le creux comprend une première face latérale secondaire et une deuxième face latérale secondaire, et
o la première pièce et la deuxième pièce sont agencées l'une par rapport à l'autre de manière à ce que la première face latérale primaire et la deuxième face latérale primaire soient en face et en contact respectivement de la première face latérale secondaire et de la deuxième face latérale secondaire ; ainsi, les faces latérales agissent comme des butées latérales et permettent ainsi de limiter ou d'empêcher les mouvement latéraux de la première pièce optique et de la deuxième pièce optique lorsque l'unité optique subit à des vibrations; ; - la première face latérale primaire et la deuxième face latérale primaire sont agencées en « V », la première face latérale secondaire et la deuxième face latérale secondaire sont agencées en « V » ; en d'autres termes, les faces latérales sont disposées face à face et inclinées de manière à s'approcher l'une de l'autre en descendant vers le bas ;
- selon l'alinéa précédent, la portion en relief est en appui au niveau de ses faces latérales primaires sur les faces latérales secondaires ; on améliore davantage le positionnement ;
- le premier collimateur et le deuxième collimateur sont agencés de manière à ce que la première source de lumière et la deuxième source de lumière puissent être positionnées dans un même plan ; ainsi, l'agencement mécanique des sources de lumière avec la pièce optique est simplifié ; en effet, les sources de lumière peuvent être montées sur un même support plan, notamment sur une même carte de circuit imprimé ; elles peuvent donc être retirées ou montées en bloc ;
- le faisceau à coupure émis par l'unité optique est un faisceau d'éclairage tandis que le faisceau sans coupure émis par l'unité optique est un faisceau de signalisation ; il s'agit donc d'un exemple des faisceaux que l'unité optique selon l'invention peut générer.
- the breaking member is limited downstream by a breaking edge, the projection system being arranged with the breaking member so as to project the image of the breaking edge, so that this image forms a line of break in the cut-off beam; in other words, the projection system is arranged on the one hand downstream of the cut-off edge so as to receive the first and the second beams after they have passed over this cut-off edge and on the other hand, so as to project at the output of the optical unit an image of the cut-off edge;
- the first optical part further comprises the projection system; this makes it possible to reduce the number of separate parts of the optical unit and therefore to simplify the production thereof; in addition, the integration of the projection system in the first optical part makes it possible to increase the precision in the direction of the light rays in the first optical part, since the positioning between the projection system and the first optical part is carried out from the manufacture, in particular by molding the first part; the positioning error between these two parts is therefore small, or even non-existent;
- the projection system includes:
- o a return diopter located downstream and opposite the cut-off edge, and
- o a terminal output diopter forming an output of the first optical part, the return diopter being arranged so as to reflect the first beam and the second beam towards this terminal output diopter,
- the first optical part comprises a surface comprising a cut-off interface delimited downstream by the cut-off edge and forming said cut-off member, the cut-off interface being arranged so as to reflect the first and the second beams; by way of example, the cut-off interface operates in total internal reflection;
- the first optical part comprises a first secondary input diopter joining with the cut-off diopter at the cut-off edge; here, the first secondary entrance interface is separate from the input interface of the first collimator, called primary input interface; in addition, the first secondary entrance interface is at the same level as the cut-off edge in the direction of propagation of the light from upstream to downstream in the first optical part;
- the second optical part comprises a first intermediate exit diopter;
- according to the previous paragraph, the second optical part and the first optical part are arranged relative to each other so that said first intermediate exit diopter is arranged opposite said first diopter secondary input, so that a first part of the second beam exits the second optical part through the first intermediate exit interface and enters the first optical part through the first secondary input interface, so that this first part of the second beam passes from a first side of the cut-off edge;
- the first optical part comprises a second secondary input diopter;
- according to the previous paragraph, the second optical part comprises a second intermediate exit dioptre, and
o the first optical part and the second optical part are arranged relative to each other so that said second secondary input diopter is arranged opposite said second intermediate output diopter, so so that a second part of the second beam exits the second optical part through the second intermediate exit diopter and enters the first optical part through the second diopter secondary input, so that this second part of the second beam passes from a second side of the cut-off edge; - the raised portion of the first optical part comprises a face forming the second secondary input diopter;
- according to the preceding paragraph, the hollow of the second optical part comprises a face forming the second intermediate exit interface; the available faces of the portion in relief and of the hollow are therefore cleverly exploited to make them active optical surfaces; this therefore makes it possible to simplify the configuration of the optical unit as a whole;
- the raised portion includes a first primary side face and a second primary side face;
- according to the previous paragraph, the hollow comprises a first secondary side face and a second secondary side face, and
o the first part and the second part are arranged relative to each other so that the first primary side face and the second primary side face are opposite and in contact respectively with the first secondary side face and with the second secondary side face; thus, the side faces act as lateral stops and thus make it possible to limit or prevent movement sides of the first optical part and of the second optical part when the optical unit undergoes vibrations; ; - the first primary side face and the second primary side face are arranged in a "V", the first secondary side face and the second secondary side face are arranged in a "V"; in other words, the side faces are arranged face to face and inclined so as to approach one another while descending downwards;
- according to the previous paragraph, the portion in relief bears at its primary side faces on the secondary side faces; positioning is further improved;
- the first collimator and the second collimator are arranged so that the first light source and the second light source can be positioned in the same plane; thus, the mechanical arrangement of the light sources with the optical part is simplified; indeed, the light sources can be mounted on the same flat support, in particular on the same printed circuit board; they can therefore be removed or assembled as a unit;
- the cut-off beam emitted by the optical unit is an illuminating beam while the uncut beam emitted by the optical unit is a signaling beam; it is therefore an example of the beams that the optical unit according to the invention can generate.
L'invention a également pour objet un dispositif lumineux de véhicule automobile, notamment un projecteur de véhicule, comprenant une unité optique selon l'invention.The invention also relates to a light device for a motor vehicle, in particular a vehicle headlamp, comprising an optical unit according to the invention.
Le dispositif lumineux comprend également les sources de lumière émettant le premier et le deuxième faisceau lumineux. Ces sources de lumière peuvent notamment être des diodes électroluminescentes, encore appelées LED (pour Light-Emitting Diode en anglais).The light device also includes the light sources emitting the first and the second light beam. These light sources can in particular be light-emitting diodes, also called LEDs (for Light-Emitting Diode in English).
Le dispositif lumineux selon l'invention peut comprend en outre un boîtier dans lequel est logée ladite unité optique.The light device according to the invention may further comprise a casing in which said optical unit is housed.
Selon une caractéristique optionnelle de l'invention, la face interne du boîtier est revêtue d'une couche métallique. Par exemple, la couche métallique peut être une couche d'aluminium déposée sur la face interne du boîtier par un procédé d'aluminage. La couche métallique permet d'améliorer l'homogénéité du faisceau lumineux généré par l'unité optique, notamment du faisceau de signalisation. La qualité du faisceau est rendue meilleure.According to an optional characteristic of the invention, the internal face of the casing is coated with a metal layer. For example, the metal layer may be an aluminum layer deposited on the internal face of the case by an aluminating process. The metal layer makes it possible to improve the homogeneity of the light beam generated by the optical unit, in particular of the signaling beam. Beam quality is improved.
Alternativement, la face interne du boîtier peut être revêtue d'une couche de couleur blanche, notamment de peinture blanche, pour un même résultat qu'apporte une couche métallique.Alternatively, the internal face of the box can be coated with a layer of white color, in particular with white paint, for the same result as a metallic layer.
Sauf indication contraire, les termes « avant », « arrière », « inférieur », « supérieur », « haut », « bas », « transversal », « longitudinal », « horizontal », ainsi que leurs déclinaisons en genre ou en nombre, se réfèrent au sens d'émission de lumière hors de l'unité optique telle qu'elle est destinée à être positionnée dans le dispositif lumineux monté dans le véhicule. Sauf indication contraire, les termes « amont » et « aval » se réfèrent au sens de propagation de la lumière au sein de l'unité optique.Unless otherwise indicated, the terms "front", "rear", "lower", "upper", "top", "bottom", "transverse", "longitudinal", "horizontal", as well as their gender or number, refer to the direction of light emission out of the optical unit as it is intended to be positioned in the light device mounted in the vehicle. Unless otherwise specified, the terms “upstream” and “downstream” refer to the direction of light propagation within the optical unit.
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée des exemples non limitatifs qui suivent, pour la compréhension de laquelle on se reportera aux dessins annexés, parmi lesquels :
- la
figure 1 illustre une vue en perspective arrière d'une unité optique selon un exemple de réalisation de l'invention; - les
figures 2 illustre respectivement une vue en perspective avant et une vue en perspective arrière d'une première pièce optique faisant partie de l'unité optique de laet 3figure 1 ; - les
figures 4 et 5 illustre respectivement une vue en perspective avant et une vue en perspective arrière d'une deuxième pièce optique faisant partie de l'unité optique de lafigure 1 ; - la
figure 6 illustre une coupe transversale montrant une section horizontale de l'unité optique de lafigure 1 ; - la
figure 7 illustre un schéma d'une coupe longitudinale de lafigure 1 , avec les rayons d'un premier faisceau ; - la
figure 8 illustre un schéma similaire à celui de lafigure 7 , mais montrant les rayons du deuxième faisceau ; - la
figure 9 illustre le premier faisceau après être émis par l'unité optique de lafigure 1 , dans un repère H, V, où H symbolise l'horizon et V l'axe vertical passant par l'axe optique D de l'unité optique ; - la
figure 10 illustre le deuxième faisceau après être émis par l'unité optique de lafigure 1 , dans le repère H,V ; - la
figure 11 illustre une vue en perspective de l'unité optique montée sur un radiateur ; - la
figure 12 illustre une vue en perspective et de face d'un boîtier qui est destiné à être fixé sur le radiateur de lafigure 11 de manière à former un logement pour l'unité optique de lafigure 1 .
- the
figure 1 illustrates a rear perspective view of an optical unit according to an exemplary embodiment of the invention; - the
figures 2 and 3 illustrates respectively a front perspective view and a rear perspective view of a first optical part forming part of the optical unit of thefigure 1 ; - the
figures 4 and 5 illustrates respectively a front perspective view and a rear perspective view of a second optical part forming part of the optical unit of thefigure 1 ; - the
figure 6 illustrates a cross section showing a horizontal section of the optical unit of thefigure 1 ; - the
figure 7 illustrates a diagram of a longitudinal section of thefigure 1 , with the rays of a first beam; - the
figure 8 illustrates a diagram similar to that of thefigure 7 , but showing the rays of the second beam; - the
figure 9 illustrates the first beam after being emitted by the optical unit of thefigure 1 , in a frame H, V, where H symbolizes the horizon and V the vertical axis passing through the optical axis D of the optical unit; - the
figure 10 illustrates the second beam after being emitted by the optical unit of thefigure 1 , in the H,V frame; - the
figure 11 illustrates a perspective view of the optical unit mounted on a radiator; - the
figure 12 illustrates a perspective and front view of a housing which is intended to be fixed on the radiator of thefigure 11 so as to form a housing for the optical unit of thefigure 1 .
Dans la suite de la description, la direction verticale est représentée par l'axe Z illustré sur les
L'horizontale désigne toutes orientations qui appartiennent ou qui sont parallèles à un plan passant par l'axe X et l'axe Y illustrés sur les figures les
L'unité optique 1 comprend une première pièce optique 10, ici, formée d'un seul bloc de matériau transparent ou translucide, par exemple obtenu par moulage. L'unité optique 1 comprend en outre une deuxième pièce optique 20, ici, formée également d'un seul bloc de matériau transparent ou translucide.The
A titre d'exemple, la première et la deuxième pièces optiques 10 et 20 peuvent être réalisé à partir du polycarbonate (PC) ou du polyméthacrylate de méthyle (PMMA).By way of example, the first and second
Ici, la deuxième pièce optique 20 s'appuie sur une face arrière 13 de la première pièce optique 10.Here, the second
La première pièce optique 10 comprend plusieurs collimateurs 11, dits premiers collimateurs 11, en face de chacun desquels est positionné une source de lumière, ci-après appelée première source de lumière 12.The first
Comme illustré sur les
La deuxième pièce optique 20 comprend également un collimateur 21, dit deuxième collimateur 21, en face duquel sont positionnées plusieurs sources de lumière, ci-après appelées deuxièmes sources de lumière 22.The second
En
Ici, la première pièce optique 10 comprend plusieurs collimateurs 11 formant des protubérances faisant saillie d'un corps 15 de ladite première pièce 10. Les premiers collimateurs 11 sont placés les uns à côté des autres de manière à former une rangée. De cette manière, les premières sources de lumière 12 sont également disposées en rangée en face des premiers collimateurs 11.Here, the first
En revanche, la deuxième pièce optique 20 comprend un seul collimateur 21 qui s'étend ici selon la largeur de ladite deuxième pièce. La largeur est la dimension de la pièce définie selon l'axe Y. Ici, le deuxième collimateur 21 est une échancrure 29 réalisée à une face inférieure 23 de la deuxième pièce optique 20. Les deuxièmes sources de lumière 22 sont disposées en rangée suivant l'étendue de l'échancrure 29.On the other hand, the second
Par ailleurs, la première et la deuxième pièces optiques 10 et 20 sont positionnées l'une par rapport à l'autre de manière à ce que les premières et deuxièmes sources de lumière 12, 22 puissent être positionnées dans un même support plan, tel qu'une surface supérieure de radiateur, ou comme ici, sur une carte de circuit imprimé 8 plane.Furthermore, the first and second
Sur les
Selon l'invention, comme dans l'exemple illustré, la première pièce optique 10 comprend une portion de projection 4, formant un système de projection 4 joint en une seule pièce avec la deuxième extrémité 15b. Autrement dit, le corps principal 15 et la portion de projection 4 forment ici le bloc de la première pièce optique 10.According to the invention, as in the example illustrated, the first
Le corps principal 15 comprend un organe de coupure 3 situé entre les extrémités 15a et 15b. Ici, l'organe de coupure 3 est un dioptre de coupure 32.The
Dans l'exemple illustré, le dioptre de coupure 32 est situé dans une portion haute du corps 15, et notamment proche de la deuxième extrémité 15b dudit corps. Dans d'autres exemples, le dioptre de coupure 32 peut se trouver dans une portion basse du corps 15, notamment plus proche de la première extrémité 15a.In the example illustrated, the cut-
Comme on peut le voir sur les
Le dioptre de coupure 32 est limité en aval par un bord de coupure 31 formant la deuxième extrémité 15b du corps principal 15.The cut-
La portion de projection 4 commence à partir de la deuxième extrémité 15b, donc à partir du bord de coupure 31. Précisément, la portion de projection 4 comprend une première portion 4a faisant saillie vers l'arrière de manière à former un nez 43. Ce dernier comprend une première face orientée vers le support des sources de lumière qui est, ici, la carte de circuit imprimé 8. Cette première face, formant un premier dioptre d'entrée secondaire 51, est sécante avec le dioptre de coupure 32 au niveau du bord de coupure 31.The
La première portion 4a comprend en outre une deuxième face située en aval et en vis-à-vis du bord de coupure 31. Ladite deuxième face forme un dioptre de renvoi 41 fonctionnant en réflexion interne totale de manière à réfléchir les rayons qui l'atteignent vers un dioptre de sortie terminal 42.The
Le dioptre de sortie terminal 42 fait partie de la portion de projection 4 et forme une sortie de la première pièce optique 10.The
Selon l'invention et comme ici, le dioptre de renvoi 41 et dioptre de sortie terminal 42 peuvent former un système convergent avec une ligne ou une surface focale, de manière à ce que le bord de coupure 31 soit agencé dans cette ligne ou cette surface focale.According to the invention and as here, the
Selon l'invention et comme on peut voir sur les
Par ailleurs, la portion en relief 6 est située du même côté et en amont du dioptre de coupure 32. Précisément, la portion en relief 6 est située entre le dioptre de coupure 32 et la première extrémité 15a. Ici, la face interne de la portion en relief 6 est dans le prolongement de la face interne 321 du dioptre de coupure 32 et s'étend jusqu'à la première extrémité 15a.Furthermore, the raised
La portion en relief 6 comprend une section croissante en direction de la première extrémité 15a. Elle comprend une base inférieure 52 formant un deuxième dioptre d'entrée secondaire 52 de la première pièce optique 10.The portion in
Comme on peut le voir en
Les
Ici, la deuxième pièce optique 20 comprend une face supérieure 24, située à l'opposé du deuxième collimateur 21 dans la direction Z. La face supérieure 24 forme un premier dioptre de sortie intermédiaire 24.Here, the second
Selon l'invention, et comme dans l'exemple illustré, la deuxième pièce optique 20 comprend, en outre, un creux 7 présentant une forme complémentaire à celle de la portion en relief 6 de la première pièce optique 10 de sorte que la portion en relief 6 se loge dans le creux 7.According to the invention, and as in the example illustrated, the second
Ici, le creux 7 est réalisé dans une face avant 23 de la deuxième pièce optique 20. Le creux 7 comprend un fond formant un deuxième dioptre de sortie intermédiaire 26.Here, the hollow 7 is made in a
Lorsque la première et la deuxième pièces optiques 10 et 20 sont assemblées, le premier dioptre de sortie intermédiaire 24 est placé en face du premier dioptre d'entrée secondaire 51 tandis que le deuxième dioptre de sortie intermédiaire 26 est placé en face du deuxième dioptre d'entrée secondaire 52.When the first and the second
En référence à la
Cela en va de même pour le deuxième dioptre de sortie intermédiaire 26 et le deuxième d'entrée secondaire 52.This is the same for the second
Un tel positionnement des pièces optiques 10 et 20, encore appelé centrage, est obtenu notamment grâce à la fixation de chacune de ces pièces sur le support commun, ici, la carte de circuit imprimé 8..Such a positioning of the
Par ailleurs, la portion en relief 6 comprend une première face latérale primaire 61 et une deuxième face latérale primaire 62. De son côté, le creux 7 comprend également deux faces latérales dont une première face latérale secondaire 71 et une deuxième face latérale secondaire 72.Furthermore, the portion in
Comme on peut voir sur la
Dans un autre mode de réalisation, on peut prévoir que le creux ne comprend pas les faces latérales. Cela permet de simplifier donc la fabrication du creux.In another embodiment, provision may be made for the hollow not to include the side faces. This therefore makes it possible to simplify the manufacture of the hollow.
Dans cet exemple, l'agencement oblique de ces faces latérales permet à la première pièce optique 10 de reposer sur les faces latérales de la deuxième pièce optique 20.In this example, the oblique arrangement of these side faces allows the first
La
Grâce à l'agencement du premier collimateur 11, une partie du premier faisceau F1 est envoyée directement vers le dioptre de renvoi 41, qui réfléchit ensuite ces rayons vers le dioptre de sortie terminal 42, d'où ces rayons sortent par réfraction inclinés vers le bas par rapport à l'axe optique A de l'unité optique 1.Thanks to the arrangement of the
Certains des autres rayons du premier faisceau F1 qui sont réfléchis dans la première pièce optique 10, ici par exemple par le dioptre de coupure 32, atteignent le dioptre de renvoi 41. Ce dernier les envoie ensuite vers le dioptre de sortie terminal 42, d'où ces rayons sortent par réfraction plus inclinés vers le bas par rapport à l'axe optique A.Some of the other rays of the first beam F1 which are reflected in the first
Encore certains des autres rayons du premier faisceau F1 passant au niveau du bord de coupure 31 atteignent ensuite le dioptre de renvoi 41, qui réfléchit ensuite ces rayons vers le dioptre de sortie terminal 42, d'où les rayons sortent par réfraction parallèles à l'axe optique A.Still some of the other rays of the first beam F1 passing at the level of the
Ainsi le premier faisceau F1 forme une portion basse C d'un faisceau d'éclairage présentant une ligne de coupure inférieure C1, image du bord de coupure 31. Ici, la ligne de coupure inférieure C1 est une ligne relativement horizontale sur la gauche et avec une portion oblique sur la droite.Thus the first beam F1 forms a low portion C of an illuminating beam having a lower cut-off line C1, image of the cut-
Ledit faisceau d'éclairage est représenté en
Les rayons lumineux réfléchis par le dioptre de coupure 32 sont projetés en dessous de la ligne de coupure C1. Le dioptre de coupure 32 forme donc bien une plieuse pour le premier faisceau F1, depuis l'intérieur de la première pièce optique 10.The light rays reflected by the cut-
La
Le deuxième collimateur 12 est agencé de manière à permettre l'entrée de l'essentiel du deuxième faisceau F2 à l'intérieur de la deuxième pièce optique 20 et d'envoyer le deuxième faisceau F2 des deux côtés du bord de coupure 31.The
Précisément, une fois entrée dans la deuxième pièce optique 20, une première partie 121 du deuxième faisceau F2 comprend des rayons lumineux généralement parallèles les uns aux autres et qui sont envoyés vers le premier dioptre de sortie intermédiaire 24.Specifically, once entered into the second
Ledit premier dioptre de sortie 24 est agencé de manière à envoyer certains rayons lumineux de la première partie 121 vers le premier dioptre d'entrée intermédiaire 51. Ces rayons atteignent ensuite le dioptre de renvoi 41, qui réfléchit ces rayons vers le dioptre de sortie terminal 42, d'où les rayons sortent par réfraction inclinés vers le haut par rapport à l'axe optique A.Said
Certains d'autres rayons de la première partie 121, en sortant du premier dioptre de sortie intermédiaire 24, atteignent le bord de coupure 31. Ils sont réfléchis ensuite vers le dioptre de renvoi 41 qui envoient ces rayons vers le dioptre de sortie terminal 42, d'où les rayons sortent par réfraction en restant parallèle à l'axe optique A.Some of the other rays of the
Une deuxième partie 122 du deuxième faisceau F2 est envoyée vers le deuxième dioptre de sortie intermédiaire 26 et entre par réfraction dans la première pièce optique 10 au travers du deuxième dioptre d'entrée intermédiaire 52.A
Dans la première pièce optique 10, la deuxième partie 122 du deuxième faisceau F2 traverse en premier la portion en relief 6. Cette dernière présente donc, ici, une fonction de guidage des rayons lumineux.In the first
Certains rayons lumineux de la deuxième partie 122 atteignent ensuite le dioptre de renvoi 41, qui les réfléchit vers le dioptre de sortie terminal 42, d'où les rayons sortent par réfraction inclinés vers le bas par rapport à l'axe optique A.Certain light rays from the
Certains des autres rayons lumineux de la deuxième partie 122 sont envoyés sur le bord de coupure 31. Puis, ils atteignent respectivement le dioptre renvoi 41 et par réflexion le dioptre de sortie terminal 42, d'où ces rayons sortent par réfraction parallèlement à l'axe optique A.Some of the other light rays of the
Ainsi, le deuxième faisceau F2 forme un faisceau de signalisation Fs comme illustré à la
La portion basse C3 est générée à partir des rayons du deuxième faisceau passant par le deuxième dioptre de sortie intermédiaire 26 et par le deuxième dioptre d'entrée secondaire 52. En outre, ces rayons passent par un premier côté, ici, en avant, du bord de coupure 31.The lower portion C3 is generated from the rays of the second beam passing through the second
La portion haute C4 est générée à partir des rayons du deuxième faisceau passant par le premier dioptre de sortie intermédiaire 24 et par le premier dioptre d'entrée secondaire 51. Comme illustré sur la
Ainsi, grâce à l'agencement du deuxième collimateur 12, de la deuxième pièce optique 20 par rapport à la première pièce optique 10, le deuxième faisceau F2 est envoyé vers les deux côtés du bord de coupure 31, ce qui permet de générer une portion haute et une portion basse formant ensemble un faisceau de signalisation.Thus, thanks to the arrangement of the
Autrement dit, la deuxième pièce optique 20 répartit le deuxième faisceau lumineux F2 de manière à ce qu'une partie dudit faisceau soit envoyée en avant et une autre partie en arrière du bord de coupure 31. Une telle répartition se combine à l'agencement du système de projection 4, intégré dans la première pièce optique 10, pour créer un faisceau sans coupure dont la signature lumineuse est la même que le faisceau à coupure généré par la première pièce optique 10 en conjonction avec la première source de lumière 12.In other words, the second
Notamment, comme les deux parties 121 et 122 du deuxième faisceau se répartissent autour et sur le bord de coupure 31 qui est formé par une arrête, la ligne de coupure n'est pas visible dans le faisceau de signalisation Fs.In particular, as the two
Sur la
Le radiateur 30 comprend des organes de fixation destinés à coopérer avec des organes de fixation d'un boîtier 9, tel qu'illustré sur la
Le boîtier 9 comprend une ouverture 91 disposée en face du dioptre de sortie terminal 42 lorsque le boîtier 9 est monté sur le radiateur. Ici, la forme de l'ouverture est semblable à celle du contour du dioptre de sortie terminal 42.The
Selon l'invention et comme dans l'exemple illustré, le boîtier 9 comprend une face interne 90 couverte d'un revêtement métallique. A titre d'exemple, le revêtement métallique peut être une couche mince d'aluminium.According to the invention and as in the example illustrated, the
Ce revêtement métallique permet d'obtenir un éclairement homogène du faisceau lumineux, notamment du faisceau de signalisation généré par l'unité optique 1.This metallic coating makes it possible to obtain uniform illumination of the light beam, in particular of the signaling beam generated by the
Alternativement, le revêtement métallique peut être remplacé par un revêtement de couleur blanche pour obtenir également un éclairement homogène.Alternatively, the metallic coating can be replaced by a white colored coating to also obtain homogeneous illumination.
Claims (14)
- Optical unit (1) for a motor vehicle comprising:- a first collimator (11) intended to receive a first light beam (F1) emitted by a first light source (12);- a second collimator (21) intended to receive a second light beam (F2) emitted by a second light source (22);- a cut off member (3);- a projection system (4);- the cut off member (3) being arranged so as to stop or reflect at least a part of the rays reaching it from one side or from the other side,- the first collimator (11) being arranged so as to send the first light beam (F1) only on one side of the cut off member (3);the optical unit (1) being characterized in that:- the second collimator (21) is arranged so as to send the second light beam (F2), on both sides of the cut off member (3); and- the projection system (4), the first collimator, the second collimator and the cut off member are arranged so as to project the first beam (F1) as a beam with cut off (C) and to project the second beam (F2) as a beam without cut off (Fs),the optical unit (1) comprising a first optical piece (10) and a second optical piece (20), the first optical piece (10) comprising the first collimator (11) and the second optical piece (20) comprising the second collimator (21), and- the first optical piece (10) comprises a portion in relief (6);- the second optical piece (20) comprises a hollow (7) having a form substantially complementing the form of the portion in relief (6) of the first piece (10) in such a way that the portion in relief (6) is housed in the hollow (7) .
- Optical unit (1) according to Claim 1, characterized in that the cut off member (3) is limited downstream by a cut off edge (31), and in that the projection system (4) is arranged with the cut off member (3) so as to project the image of the cut off edge (31), in such a way that this image forms a cut off line (C1) in the beam with cut off.
- Optical unit (1) according to one of the preceding claims, characterized in that the first optical piece (10) further comprises the projection system (4).
- Optical unit (1) according to Claim 3 taken in combination with Claim 2, characterized in that the projection system (4) comprises:- a return dioptre (41) situated downstream and facing the cut off edge (31); and- a terminal output dioptre (42) forming an output of the first optical piece (10), the return dioptre (41) being arranged so as to reflect the first beam (F1) and the second beam (F2) towards this terminal output dioptre (42),the return dioptre (41) and the terminal output dioptre (42) being arranged so that the first and second beams (F1, F2) are refracted by the terminal output dioptre.
- Optical unit (1) according to one of the preceding claims when taken in combination with Claim 2, characterized in that the first optical piece (10) comprises a surface comprising a cut off dioptre (32) delimited downstream by the cut off edge and forming said cut off member (3), the cut off dioptre (32) being arranged so as to reflect the first and second beams (F1, F2) .
- Optical unit (1) according to Claim 5, characterized in that the first optical piece (10) comprises a first secondary input dioptre (51) joining with the cut off dioptre (32) at the cut off edge (31).
- Optical unit (1) according to Claim 6, characterized in that:- the second optical piece (20) comprises a first intermediate output dioptre (24),- the second optical piece (20) and the first optical piece (10) are arranged with respect to one another in such a way that said first intermediate output dioptre is disposed facing said first secondary input dioptre (51), in such a way that a first part (121) of the second beam (F2) leaves the second optical piece (20) through the first intermediate output dioptre (24) and enters into the first optical piece (10) via the first secondary input dioptre (51), such that this first part (121) of the second beam (F2) passes on a first side of the cut off edge (31).
- Optical unit (1) according to Claim 7, characterized in that:- the first optical piece (10) comprises a second secondary input dioptre (52);- the second optical piece (20) comprises a second intermediate output dioptre (26);- the first optical piece (10) and the second optical piece (20) are arranged with respect to one another in such a way that said second secondary input dioptre (52) is disposed facing said second intermediate output dioptre (26), in such a way that a second part (122) of the second beam (F2) leaves the second optical piece (20) through the second intermediate output dioptre (26) and enters into the first optical piece (10) through the second secondary input dioptre (52), such that this second part (122) of the second beam (F2) passes on a second side of the cut off edge (31).
- Optical unit (1) according to Claim 8, characterized in that:- the portion in relief (6) of the first optical piece (10) comprises a face forming the second secondary input dioptre (52);- the hollow (7) of the second optical piece (20) comprises a face forming the second intermediate output dioptre (26).
- Optical unit (1) according to one of the preceding claims, characterized in that:- the portion in relief (6) comprises a first primary lateral face (61) and a second primary lateral face (62);- the hollow (7) comprises a first secondary lateral face (71) and a second secondary lateral face (72);- the first piece (10) and the second piece (20) are arranged with respect to one another in such a way that the first primary lateral face (61) and the second primary lateral face (62) are facing and in contact respectively with the first secondary lateral face (71) and with the second secondary lateral face (72).
- Optical unit (1) according to one of the preceding claims, characterized in that the first collimator (11) and the second collimator (21) are arranged in such a way that the first light source (12) and the second light source (22) can be positioned in the same plane.
- Optical unit (1) according to one of the preceding claims, characterized in that the beam with cut off emitted by the optical unit is a lighting beam and in that the beam without cut off emitted by the optical unit is a signalling beam.
- Motor vehicle light device characterized in that it comprises an optical unit (1) according to one of the preceding claims and a housing (9) in which said optical unit (1) is housed.
- Light device according to Claim 13, characterized in that the housing (9) comprises an internal face (91) coated with a metallic layer or a white coloured layer.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1858995A FR3086728B1 (en) | 2018-09-28 | 2018-09-28 | BIFUNCTIONAL SIGNALING AND LIGHTING OPTICAL UNIT |
Publications (2)
Publication Number | Publication Date |
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EP3628914A1 EP3628914A1 (en) | 2020-04-01 |
EP3628914B1 true EP3628914B1 (en) | 2022-01-12 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP19198118.2A Active EP3628914B1 (en) | 2018-09-28 | 2019-09-18 | Optical unit with dual signalling and lighting function |
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EP (1) | EP3628914B1 (en) |
FR (1) | FR3086728B1 (en) |
Families Citing this family (1)
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FR3144077A1 (en) * | 2022-12-21 | 2024-06-28 | Valeo Vision | Light module for vehicle lighting system |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH07118208B2 (en) * | 1988-06-28 | 1995-12-18 | 株式会社小糸製作所 | Automotive headlights |
JP4615417B2 (en) * | 2005-10-13 | 2011-01-19 | 株式会社小糸製作所 | Vehicle headlamp lamp unit |
JP5652996B2 (en) * | 2008-11-12 | 2015-01-14 | 株式会社小糸製作所 | Vehicle lighting |
JP5719671B2 (en) * | 2010-11-05 | 2015-05-20 | 株式会社小糸製作所 | Vehicle lighting |
FR3039883B1 (en) | 2015-08-06 | 2020-10-02 | Valeo Vision | LUMINOUS MODULE IN TRANSPARENT MATERIAL WITH TWO SIDES OF REFLECTION |
FR3056688B1 (en) * | 2016-09-26 | 2018-11-02 | Valeo Vision | BI-FUNCTION LIGHTING MODULE IN TRANSPARENT MATERIAL |
-
2018
- 2018-09-28 FR FR1858995A patent/FR3086728B1/en active Active
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2019
- 2019-09-18 EP EP19198118.2A patent/EP3628914B1/en active Active
Also Published As
Publication number | Publication date |
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FR3086728A1 (en) | 2020-04-03 |
EP3628914A1 (en) | 2020-04-01 |
FR3086728B1 (en) | 2021-07-30 |
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