EP3775675A1 - Dispositif lumineux à matrice monolithique de véhicule automobile pour écriture au sol - Google Patents
Dispositif lumineux à matrice monolithique de véhicule automobile pour écriture au solInfo
- Publication number
- EP3775675A1 EP3775675A1 EP19715476.8A EP19715476A EP3775675A1 EP 3775675 A1 EP3775675 A1 EP 3775675A1 EP 19715476 A EP19715476 A EP 19715476A EP 3775675 A1 EP3775675 A1 EP 3775675A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- module
- beams
- pixelated
- pixel
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
- B60Q1/18—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights being additional front lights
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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]
- F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
-
- 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]
- F21S41/151—Light emitting diodes [LED] arranged in one or more lines
- F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
-
- 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
- F21S41/255—Lenses with a front view of circular or truncated circular outline
-
- 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
-
- 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
- F21S41/16—Laser light sources
-
- 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
- F21W2102/14—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 vertical cut-off lines; specially adapted for adaptive high beams, i.e. wherein the beam is broader but avoids glaring other road users
-
- 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
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the invention relates to the technical field of lighting and signaling of a motor vehicle, particularly light devices for writing ground information for road users including pedestrians.
- the projection of a light beam by a light device of a motor vehicle conventionally allows to illuminate the road with a global lighting and thus to increase the visibility in case of darkness, for example at night. This allows secure driving of the vehicle.
- These lighting devices of a motor vehicle provide the conventional lighting and / or signaling functions, and in particular a high beam function also noted HB (acronym for "high beam"), a low beam function rated LB (acronym for "low beam”).
- HB and LB functions are regulated, for example by ECE regulations.
- the regulations require that the light beam of the LB function comprise a cut line comprising an oblique zone; the upper part of the oblique zone is called “shoulder” and the lower part of the oblique zone is called “kink”. Above the cut line, little or no light can be emitted. Below the cutoff line, light is emitted.
- the light device can also perform localized lighting functions, for example project a pattern on the scene.
- localized lighting functions for example project a pattern on the scene.
- Such functions are known in the field of adaptive lighting (ADB).
- ADB adaptive lighting
- glare free lighting consisting for example of darkening an area corresponding to a vehicle coming from the front so as not to dazzle this other user.
- DBL turn-lighting function
- DBL turn-lighting function which modifies the illuminated area of the scene when the vehicle has a direction that is not rectilinear, for example in a corner or in a road intersection.
- light devices comprising a laser source, a matrix of micro-mirrors for scanning the field to be illuminated and of writing on the ground and a device for converting the length of the light are known.
- these devices are very expensive.
- it would be difficult to multiply the laser sources because it is very complicated to combine the beams of different laser diodes so as to have a sufficiently small beam diameter at both the scanning system and the length conversion device. wave.
- the invention therefore aims at obtaining a luminous device which brings new possibilities of layout and design, and compatible with a good compromise between lighting performance, in particular making it possible to double the luminous intensity of the center of the high beam function. while allowing the information ground writing, and having good heat dissipation.
- the present invention proposes a light device for a motor vehicle, comprising a first module capable of projecting a first beam of road type, partial or complete, pixelated, a second module capable of projecting a second beam type write on pixelated road, and a third module capable of projecting a third cut-off beam (cross type).
- the first, second and third modules are arranged so that the first and second beams overlap at least partially vertically; and the second and third beams overlap at least partially vertically.
- module capable of making a pixelated beam including a module comprising:
- a pixelated light source comprising a plurality of elementary emitters arranged in a matrix, each of the elementary emitters being selectively activatable to emit an elementary light beam; and an optical projection element associated with said pixelated light source for projecting each of said elementary light beams in the form of a pixel, the set of pixels forming said pixelated beam.
- the pixelated light source is associated with a control unit capable of selectively controlling the luminous intensity of each pixel of the pixelated beam, and in particular selectively enabling or disabling each of the pixels of said pixelated beam, according to instructions from control received by the control unit.
- the projection optical element is arranged so that the pixelated beam has a vertical amplitude of at least 5 ° and a horizontal amplitude of at least 5 °.
- These horizontal and vertical amplitudes make it possible to ensure that the pixelated beam is projected onto a sufficiently wide area of the road to perform road writing functions by projecting a pattern into this pixelated beam, and in particular functions of ground marking, driving assistance and GPS information projection, or adaptive lighting functions requiring pixilation of the light beam and in particular non-dazzling high beam lighting functions
- the optical projection element may thus comprise one or a combination of several of the following optical components: lens, reflector, guide, collimator, prism.
- the pixelated light source may comprise at least 20 columns and at least 20 lines of elementary emitters, including at least 32 rows and columns of elementary emitters.
- the elementary emitters and the projection optical element are arranged so that two neighboring pixels, that is to say two adjacent pixels on the same line or on the same column, are contiguous, that is to say that their adjacent edges are merged.
- pixelated light source is also meant the set of at least one light source formed of at least one light emitting diode emitting light and a matrix of micro-mirrors (also known by the acronym DMD, for English Digital Micromirror Device) which directs the light rays from said at least one light source by reflection to an optical projection element.
- an optical element can collect the rays of the at least one light source to concentrate and direct them to the surface of the matrix of micro-mirrors.
- Each micro-mirror can pivot between two fixed positions, a first position in which the light rays are reflected towards the projection optical element, and a second position in which the light rays are reflected in a different direction from the projection optical element .
- the two fixed positions are oriented in the same manner for all the micro-mirrors and form, with respect to a reference plane supporting the matrix of micro-mirrors, an angle a characteristic of the matrix of micro-mirrors, defined in its specifications.
- This angle a is generally less than 20 ° and is usually about 12 °.
- pixelated light source is also meant a laser scanning system in which a laser source emitting a laser beam to scanning devices configured to scan with the laser beam the surface of a wavelength converter element, which surface is imaged by an optical projection element.
- the scanning of the beam is accomplished by the scanning devices at a speed great enough that the human eye does not perceive its displacement in the projected image.
- the synchronized control of the ignition of the laser source and the scanning movement of the beam makes it possible to generate a pixelated light beam.
- the scanning devices are a mobile micro-mirror, for scanning the surface of the wavelength converter element by reflection of the laser beam.
- the micro-mirrors mentioned as scanning devices are for example MEMS type (for "Micro-Electro-Mechanical Systems" in English or microsystem electromechanical).
- the invention is in no way limited to this scanning means and may use other kinds of scanning devices, such as a series of mirrors arranged on a rotating element, the rotation of the element generating a scanning of the transmission surface by the laser beam
- pixelated light source is also meant a light emitting source (called “solid-state light source”).
- the electroluminescent source comprises a plurality of elementary elements called light emitting elements arranged in a matrix according to at least two columns and two lines. Examples of electroluminescent elements include the light emitting diode (LED), the organic light-emitting diode (OLED) or the polymeric light emitting diode (PLED). acronym for "Polymer Light-Emitting Diode”), or the micro-LED.
- the electroluminescent source comprises at least one matrix of monolithic electroluminescent elements, also called monolithic matrix.
- the electroluminescent elements are grown from a common substrate and are electrically connected to be selectively activatable individually or by a subset of electroluminescent elements.
- the substrate may be predominantly of semiconductor material.
- the substrate may comprise one or more other materials, for example non-semiconductors.
- each electroluminescent element or group of electroluminescent elements can form a light pixel and can emit light when its or their material is supplied with electricity.
- the configuration of such a monolithic matrix allows the arrangement of selectively activatable pixels very close to each other, compared to conventional light-emitting diodes intended to be soldered to printed circuit boards.
- the monolithic matrix comprises electroluminescent elements whose principal dimension of elongation, namely the height, is substantially perpendicular to a common substrate, this height being at most equal to one micrometer.
- the monolithic matrix (s) capable of emitting light rays can be coupled to a control unit for the light emission of the pixelated source.
- the control unit can thus control (we can also say control) the generation and / or the projection of a pixilated light beam by the light device.
- the control unit can be integrated into the luminous device.
- the control unit can be mounted on one or more of the dies, the assembly thus forming a light module.
- the control unit may comprise a central processing unit coupled with a memory on which is stored a computer program which includes instructions for the processor to perform steps generating signals for controlling the light source.
- the control unit can thus for example individually control the light emission of each pixel of a matrix.
- the luminance obtained by the plurality of electroluminescent elements is at least 60Cd / mm 2 , preferably at least 80Cd / mm 2 .
- the control unit can form an electronic device capable of controlling the electroluminescent elements.
- the control unit can be an integrated circuit.
- An integrated circuit also called electronic chip, is an electronic component reproducing one or more electronic functions and can integrate several types of basic electronic components, for example in a small volume (i.e. on a small plate). This makes the circuit easy to implement.
- the integrated circuit may be for example an ASIC or an ASSP.
- An ASIC (acronym for "Application-Specific Integrated Circuit") is an integrated circuit developed for at least one specific application (that is to say for a client). An ASIC is therefore a specialized integrated circuit (microelectronic). In general, it brings together a large number of unique or tailor-made features.
- An ASSP (acronym for "Application Specifies Standard Product") is an integrated electronic circuit (microelectronics) grouping a large number of features to satisfy a generally standardized application.
- An ASIC is designed for a more specific (specific) need than an ASSP.
- the electricity supply of the monolithic matrices is performed via the electronic device, which itself is supplied with electricity using, for example, at least one connector connecting it to a source of electricity.
- the source of electricity may be internal or external to the device according to the invention.
- the electronic device supplies the light source with electricity. The electronic device is thus able to control the light source.
- the light source comprises at least one monolithic matrix whose electroluminescent elements protrude from a common substrate from which they respectively grew.
- electroluminescent elements can meet this definition of monolithic matrix, since the electroluminescent elements have one of their main dimensions of elongation substantially perpendicular to a common substrate and that the spacing between the pixels formed by a or more electroluminescent elements grouped together electrically, is small in comparison with the spacings imposed in known arrangements of flat square chips soldered on a printed circuit board.
- the light source according to one aspect of the invention may comprise, as will be described in greater detail below, a plurality of elements electroluminescent electrodes different from the others and that are grown individually from the substrate, being electrically connected to be selectively activatable, where appropriate by subsets within which rods can be activated simultaneously.
- the monolithic matrix comprises a plurality of submillimetric electroluminescent elements, which are arranged projecting from a substrate so as to form hexagonal rods.
- the electroluminescent rods extend parallel to the optical axis of the light module when the light source is in position in the housing.
- electroluminescent rods are grouped, in particular by electrical connections specific to each set, into a plurality of selectively activatable portions.
- the electroluminescent rods originate on a first face of a substrate.
- Each electroluminescent rod here formed using gallium nitride (GaN)
- GaN gallium nitride
- the electroluminescent rods could be made from an alloy of aluminum nitride and gallium nitride (AIGaN), or from an alloy of aluminum phosphides, indium and gallium (AlinGaP).
- AIGaN alloy of aluminum nitride and gallium nitride
- AlinGaP aluminum phosphides
- Each electroluminescent rod extends along an axis of elongation defining its height, the base of each rod being disposed in a plane of the upper face of the substrate.
- the electroluminescent rods of the same monolithic matrix advantageously have the same shape and the same dimensions. They are each delimited by an end face and a circumferential wall which extends along the axis of elongation of the stick.
- the electroluminescent rods are doped and polarized, the resulting light at the output of the semiconductor source is emitted essentially from the circumferential wall, it being understood that light rays can also emerge from the face. terminal.
- each electroluminescent rod acts as a single light-emitting diode and the luminance of this source is improved on the one hand by the density of the electroluminescent rods present and on the other hand by the size of the illuminating surface defined by the circumferential wall.
- the height of a stick may be between 2 and 10 ⁇ m, preferably 8 ⁇ m; the largest dimension of the end face of a rod is less than 2 ⁇ m, preferably less than or equal to 1 ⁇ m. It will be understood that, during the formation of electroluminescent rods, the height can be varied from one zone of the light source to the other, so as to increase the luminance of the corresponding zone when the average height of the rods constituting it is increased.
- a group of electroluminescent rods may have a height, or heights, different from another group of electroluminescent rods, these two groups constituting the same semiconductor light source comprising electroluminescent rods of submillimeter dimensions.
- the shape of the electroluminescent rods can also vary from one monolithic matrix to another, especially on the rods section and on the shape of the end face.
- the rods have a generally cylindrical shape, and may in particular have a polygonal sectional shape, and more particularly hexagonal. It is understood that it is important that light can be emitted through the circumferential wall, that it has a polygonal or circular shape.
- the end face may have a substantially planar shape and perpendicular to the circumferential wall, so that it extends substantially parallel to the upper face of the substrate, or it may have a domed or pointed shape at its center , so as to multiply the directions of emission of the light coming out of this end face.
- the electroluminescent rods are arranged in two-dimensional matrix. This arrangement could be such that the rods are arranged in staggered rows.
- the rods are arranged at regular intervals on the substrate and the separation distance of two immediately adjacent electroluminescent rods, in each of the dimensions of the matrix, must be at least 2 ⁇ m, preferably between 3 ⁇ m and 10 ⁇ m. pm, so that the light emitted by the circumferential wall of each stick can exit the matrix of electroluminescent rods.
- these separation distances measured between two axes of elongation of adjacent rods, are not greater than 100 pm.
- the monolithic matrix may comprise electroluminescent elements formed by layers of epitaxial electroluminescent elements, in particular a first n-doped GaN layer and a second p-doped GaN layer, on a single substrate, for example. silicon carbide, which is cut (by grinding and / or ablation) to form a plurality of pixels respectively from the same substrate.
- electroluminescent elements formed by layers of epitaxial electroluminescent elements, in particular a first n-doped GaN layer and a second p-doped GaN layer, on a single substrate, for example.
- silicon carbide which is cut (by grinding and / or ablation) to form a plurality of pixels respectively from the same substrate.
- the substrate of the monolithic matrix may have a thickness of between 100 ⁇ m and 800 ⁇ m, in particular equal to 200 ⁇ m; each block may have a width and width, each being between 50 pm and 500 pm, preferably between 100 pm and 200 pm. In a variant, the length and the width are equal.
- the height of each block is less than 500 ⁇ m, preferably less than 300 ⁇ m.
- the exit surface of each block can be made via the subtrate on the opposite side to the epitaxy.
- the distance between each contiguous pixel may be less than 1 ⁇ m, in particular less than 500 ⁇ m, and it is preferably less than 200 ⁇ m.
- the monolithic matrix may further comprise a layer of a polymeric material in which the electroluminescent elements are at least partially embedded.
- the layer may thus extend over the whole extent of the substrate or only around a given group of electroluminescent elements.
- the polymeric material which may in particular be based on silicone, creates a protective layer that protects the electroluminescent elements without impeding the scattering of light rays.
- wavelength converting means and for example phosphors, able to absorb at least a portion of the rays emitted by one of the elements and to be converted. at least a portion of said excitation light absorbed into an emission light having a wavelength different from that of the excitation light. It can be provided without distinction whether the phosphors are embedded in the mass of the polymeric material, or that they are arranged on the surface of the layer of this polymeric material.
- the light source may further include a reflective material coating to deflect the light rays to the output surfaces of the pixelated source.
- the electroluminescent elements of submillimetric dimensions define in a plane, substantially parallel to the substrate, a determined exit surface. It is understood that the shape of this output surface is defined according to the number and arrangement of the electroluminescent elements that compose it. It is thus possible to define a substantially rectangular shape of the emission surface, it being understood that this can vary and take any shape without departing from the context of the invention.
- the first light module of the light device makes it possible to perform the total or partial road lighting function by projecting a complementary light beam from the cut-off beam generated by the third light module.
- the second module projects a road-writing beam which will be superimposed on the road-type beam as well as on the cut-off beam.
- the at least partial vertical superimposition of the road-type light beam and of the ground-type beam beam makes it possible to increase the luminous intensity of the road beam, particularly in the center of the latter, and thus to improve the driver's comfort and other road users.
- the at least partial superimposition of the write-on-road beam with the cut-off beam makes it possible to write on the ground thanks to the possible overcurrent by driving the pixellated light source of the second module or by under-feeding the cut-off beam or, in switching off the relevant portion of the cutoff beam if the third module comprises a pixellated light source, the pixels being selectively activatable.
- the first and third beams overlap at least partially vertically.
- the light device further comprises a control unit capable of selectively controlling the light intensity of each of the pixels of the second beam so as to project a pattern in the sub-beam formed by the combination of the second and third beams.
- the sub-beam formed by the combination of the first and second beams has (when projected on a screen at 25m) a maximum intensity centered on the horizon line and a vertical axis through which the axis passes. optical light device.
- the first module is capable of projecting a fourth pixelized partial road-type beam juxtaposed horizontally to the first pixel-like partial route beam.
- the second module is capable of projecting a fifth pixelized partial road-type beam overlaps at least partially or is juxtaposed horizontally to the first pixel-like partial route beam.
- the first and second modules are arranged so that the first beam is located between the fourth and second beams or between the fifth and second beams.
- the second module is arranged so that the second beam can overlap at least partially horizontally with the fourth pixel-type partial route beam.
- each pixelized beam has a vertical amplitude of at least 5 ° and a horizontal amplitude of at least 5 °.
- the resolution of the first beam is substantially identical to the resolution of the fourth beam.
- the resolution of the 2nd beam is substantially identical to the resolution of the 5th beam.
- the luminous device light device according to one of the preceding claims, wherein the resolution of each of the 1st, 2nd, 4th and 5th beams is substantially identical.
- the present invention further provides a motor vehicle comprising at least one light device according to the invention, preferably at least two.
- each light device is arranged on either side of the motor vehicle, preferably on either side of the longitudinal axis of said vehicle.
- FIGS. 1 and 2 show front and top views of a light device according to a preferred embodiment of the invention
- FIG. 3 is a global beam projected by the light device according to a first embodiment
- FIG. 4 is a global beam projected by the light device according to a third embodiment
- FIG. 5 is a global beam projected by the light device according to a fourth embodiment
- FIG. 6 is a global beam projected by the light device according to a fifth embodiment.
- FIGS. 1 and 2 show a light device 1 according to one embodiment of the invention.
- This luminous device comprises a first light module 2 capable of projecting a first beam of partial or complete pixelated HR road type, a second light module 3 capable of projecting a second write-on-ER beam, and a third light module 3 adapted to project a third cut beam LB such as a dipped beam, pixelated or not.
- the first, second and third beams HR, ER, and LB have been represented in FIG. 3, in projection on a screen placed at 25 meters from the light device 1 and on which a horizontal axis HH representing the horizon and an axis has been materialized.
- vertical VV perpendicular to the horizontal axis HH and crossing the optical axis X of the luminous device 1.
- the first module 2 comprises:
- a pixelated light source 21 comprising 1232 pixels, each pixel comprising at least one elementary emitter, arranged in a matrix of 28 rows of pixels by 44 columns of pixels, each of the pixels being selectively activatable to emit an elementary light beam;
- an optical projection element 22 associated with said pixelated light source for projecting each of said elementary light beams in the form of a pixel having a width and a length of 0.3 °.
- the pixels projected by the first module 2 form said first pixelated beam HR.
- This HR beam has a horizontal amplitude of 12 ° and a vertical amplitude of 9 °. It extends asymmetrically on both sides of the vertical axis VV.
- the HR beam extends 4 ° on the inside-vehicle side and 8 ° on the outside-vehicle side. It also extends over 5 ° above the horizontal axis HH and 3 ° below the horizontal axis HH.
- the pixelated light source 21 comprises a monolithic matrix, as described above.
- the first light module may comprise other elements than those previously described. These elements will not be described in the context of the present invention since they do not interact functionally with the provisions of the invention.
- the third module 4 comprises:
- a light source 41 comprising a plurality of emitters, for example nine light-emitting diodes arranged along a line, each diode being able to emit an elementary light beam;
- a plurality 42 of primary optical elements disposed in front of the array 41 for collecting, shaping and guiding the elementary light beams from each of the light-emitting diodes;
- an optical projection element 43 disposed in front of the primary optical elements to project each of said elementary light beams from the primary optical elements in the form of a pixel having a width of 3 ° and a length of 5 °.
- the nine light-emitting diodes are selectively activatable.
- This beam LB has a horizontal amplitude of 20 ° and a vertical amplitude of 8 °.
- the third light module 3 is arranged so that the third crossing-type beam has an upper crossover-type break LB CO.
- the primary optical elements 42 are arranged so that their outlet surfaces are abutted so that the lower edges of these surfaces are contiguous and aligned and the projection optical element 43 is focused on these exit surfaces. . In this way, the projection optical element 43 comes to image these lower edges in one upper cut LB CO, defined by the upper edges of the pixels making up this third light beam.
- the upper cutoff comprises a single flat horizontal portion, arranged at 0.57 ° below the horizontal axis H-H.
- the second module 3 comprises:
- a pixelated light source 31 comprising 1232 pixels, each pixel comprising at least one elementary emitter, arranged in a matrix of 28 lines of pixels per 44 columns of pixels, each of the pixels being selectively activatable to emit an elementary light beam;
- an optical projection element 32 associated with said pixelated light source for projecting each of said elementary light beams in the form of a pixel having a width and a length of 0.3 °.
- This ER beam has a horizontal amplitude of 12 ° and a vertical amplitude of 8 °. It extends symmetrically on either side of the vertical axis V-V.
- the HR beam extends on 6 ° of the inner-vehicle side and thus on 6 ° of the outer-vehicle side. It extends asymmetrically over 3 ° above the horizontal axis H-H and 5 ° below the horizontal axis H-H.
- the pixelated light source 31 comprises a monolithic matrix, as described above. It will be possible to replace the pixelated light source 31 with any other type of pixelated light source described above, such as, for example, a matrix of light-emitting diodes or a light source associated with a matrix of optoelectronic elements such as micro-pixels. mirrors.
- the first light module may comprise other elements than those previously described. These elements will not be described in the context of the present invention since they do not interact functionally with the provisions of the invention.
- the beam ER has a light intensity greater than that of the beam LB and then it is possible to write on the ground in positive contrast so that it can be seen by the driver and / or the other users;
- the beam LB is produced by a pixelated light source of the third module 4, the pixels of which are addressable and individually activatable, whereas the pixels of the beam LB of the common area with the beam ER will be extinguished to reveal the pattern produced by the beam ER.
- the luminous device 1 comprises a control unit 5 able to selectively control the luminous intensity of each of the pixels of the first and second beams HR and LB according to the control instructions it receives, for example by switching on, by selectively switching off the elementary emitters of the light sources 21 and 31 or by varying increasingly or decreasingly the electrical power supplied to each of these elementary emitters.
- the first module 2 is capable of projecting a fourth pixelated partial-road HR-CO beam horizontally juxtaposed with the first pixelized partial-route HR beam.
- the first module 2 then comprises a second pixellated light source of the same type as the pixelated light source 21, that is to say having 1232 pixels, each pixel comprising at least one elementary emitter, arranged in a matrix of 28 lines of pixels per pixel. columns of pixels, each of the pixels being selectively activatable to emit an elementary light beam.
- An optical projection element is associated with said second pixelated light source of this first module 2 to project each of said elementary light beams in the form of a pixel having a width and a length of 0.3 °.
- the HR-CO beam has a horizontal amplitude of 12 ° and a vertical amplitude of 8 °.
- the HR-CO beam extends over 12 ° from the right edge of the HR beam, that is to say the edge of the outside-vehicle side. . It also extends over 5 ° above the horizontal axis H-H and 3 ° below the horizontal axis H-H.
- the second module 3 is capable of projecting a fifth
- the pixelated partial-course HR-C02 beam overlaps at least partially or is horizontally juxtaposed with the first pixelized partial route HR beam. This is illustrated in Figure 4.
- the second module 3 then comprises a second pixelated light source of the same type as the pixelated light source 31, that is to say having 1232 pixels, each pixel comprising at least one elementary emitter, arranged in a matrix of 28 lines of pixels per pixel. columns of pixels, each of the pixels being selectively activatable to emit an elementary light beam.
- An optical projection element is associated with said second pixelated light source of this second module 3 for projecting each of said elementary light beams in the form of a pixel having a width and a length of 0.3 °.
- the HR-C02 beam has a horizontal amplitude of 12 ° and a vertical amplitude of 8 °.
- the HR-CO beam extends over 12 ° from the left edge of the HR beam, that is to say from the edge of the interior-vehicle side. . It also extends over 5 ° above the horizontal axis H-H and 3 ° below the horizontal axis H-H. on the inside-vehicle side
- a fourth embodiment is identical to the third embodiment with the exception of the first module 2.
- the latter comprises:
- a pixelated light source comprising 2464 pixels, each pixel comprising at least one elementary emitter, arranged in a matrix of 28 rows of pixels by 88 columns of pixels, each of the pixels being selectively activatable to emit an elementary light beam;
- an optical projection element associated with said pixelated light source for projecting each of said elementary light beams in the form of a pixel having a width and a length of 0.3 °.
- All the pixels projected by the first module 2 form a pixelized HR-D beam.
- This HR-D beam has a horizontal amplitude of 24 ° and a vertical amplitude of 9 °. It extends asymmetrically on both sides of the vertical axis VV.
- the HR beam extends 4 ° on the inside-vehicle side and 20 ° on the outside-vehicle side. It also extends over 5 ° above the hori zontal axis HH and 3 ° below the horizontal axis HH.
- the first module 2 is more compact, and therefore the light device 1 also with respect to the third embodiment.
- the different light beams obtained are illustrated in FIG.
- the first module 2 comprises:
- a pixelated light source comprising 3696 pixels, each pixel comprising at least one elementary emitter, arranged in a matrix of 28 lines of pixels per 132 columns of pixels, each of the pixels being selectively activatable to emit an elementary light beam;
- an optical projection element associated with said pixelated light source for projecting each of said elementary light beams in the form of a pixel having a width and a length of 0.3 °.
- This HR-G beam has a horizontal amplitude of 36 ° and a vertical amplitude of 9 °. It extends asymmetrically on both sides of the vertical axis V-V.
- the HR beam extends on 16 ° of the inner-vehicular side and on 20 ° of the outer-vehicle side. It also extends over 5 ° above the horizontal axis H-H and 3 ° below the horizontal axis H-H.
- the first module 2 is more compact, and therefore the light device 1 also with respect to the third embodiment.
- the different light beams obtained are illustrated in FIG.
- the second and third modules remain identical to the first embodiment.
- the pixilated light sources may also have different resolutions to each other according to the requested requirements. It will be understood that in each of the cases of implementation of a monolithic source according to the invention, it is thus possible, by the electrical connection of the electroluminescent elements that are distinct from the others or else by the shape of the cuts of the electroluminescent blocks, to make particular arrangements. portions selectively activatable in the emitting surface, whether in terms of their shape or size.
- the substrate may be common to all the electroluminescent elements making up the different portions of the monolithic matrix. This optimizes the number of electrical connection wires, and facilitates the bringing together of the portions of the light source, the joined character of this arrangement being particularly advantageous for obtaining a homogeneous flow when both portions of the electroluminescent light source are activated simultaneously.
- a monolithic source and for example a semiconductor source comprising electroluminescent rods, and a simple shaping optics, that is to say, as a example a converging lens and / or a parabolic mirror, without the need for intermediate optical surfaces between these two elements.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Mathematical Physics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1852899A FR3079467A1 (fr) | 2018-04-03 | 2018-04-03 | Dispositif lumineux a matrice monolithique de vehicule automobile pour ecriture au sol |
PCT/EP2019/058439 WO2019193074A1 (fr) | 2018-04-03 | 2019-04-03 | Dispositif lumineux à matrice monolithique de véhicule automobile pour écriture au sol |
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EP3775675A1 true EP3775675A1 (fr) | 2021-02-17 |
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ID=62528668
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Application Number | Title | Priority Date | Filing Date |
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EP19715476.8A Pending EP3775675A1 (fr) | 2018-04-03 | 2019-04-03 | Dispositif lumineux à matrice monolithique de véhicule automobile pour écriture au sol |
Country Status (6)
Country | Link |
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US (1) | US11370352B2 (fr) |
EP (1) | EP3775675A1 (fr) |
JP (1) | JP7339716B2 (fr) |
CN (1) | CN112236617B (fr) |
FR (1) | FR3079467A1 (fr) |
WO (1) | WO2019193074A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102018112453A1 (de) * | 2018-05-24 | 2019-11-28 | HELLA GmbH & Co. KGaA | Vorfeldlichtmodul |
FR3105347A1 (fr) * | 2019-12-19 | 2021-06-25 | Valeo Vision | Dispositif lumineux apte à projeter deux faisceaux lumineux pixélisés |
FR3116103A1 (fr) | 2020-11-06 | 2022-05-13 | Psa Automobiles Sa | Dispositif d’éclairage adaptatif comportant un module tournant, et véhicule ainsi équipé. |
FR3119221A1 (fr) * | 2021-01-22 | 2022-07-29 | Valeo Vision | Système d’éclairage de véhicule automobile muni d’un module lumineux apte à émettre un faisceau lumineux pixélisé |
CN116677948B (zh) * | 2023-08-03 | 2024-01-12 | 常州星宇车灯股份有限公司 | 汽车照明场景的实现方法 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7815350B2 (en) * | 2005-04-21 | 2010-10-19 | Magna International Inc. | Headlamp with beam patterns formed from semiconductor light sources |
DE102005041234A1 (de) * | 2005-08-31 | 2007-03-01 | Hella Kgaa Hueck & Co. | Scheinwerfer für Fahrzeuge |
DE102007052745A1 (de) * | 2007-11-06 | 2009-05-07 | Hella Kgaa Hueck & Co. | Scheinwerfer für Fahrzeuge |
JP5532310B2 (ja) * | 2010-03-25 | 2014-06-25 | スタンレー電気株式会社 | 車両用灯具 |
JP5894433B2 (ja) * | 2011-12-26 | 2016-03-30 | 株式会社小糸製作所 | 車両用灯具 |
JP6174337B2 (ja) * | 2013-02-27 | 2017-08-02 | 株式会社小糸製作所 | 車両用灯具 |
FR3006746B1 (fr) * | 2013-06-11 | 2017-12-08 | Valeo Vision | Projecteur pour vehicule automobile comprenant une source de lumiere laser |
JP6426097B2 (ja) * | 2013-09-03 | 2018-11-21 | 株式会社小糸製作所 | 車両用灯具システム |
JP6411771B2 (ja) * | 2014-04-16 | 2018-10-24 | 株式会社小糸製作所 | 車両用灯具 |
US10066799B2 (en) * | 2014-06-26 | 2018-09-04 | Texas Instruments Incorporated | Pixelated projection for automotive headlamp |
JP6416736B2 (ja) * | 2015-11-12 | 2018-10-31 | トヨタ自動車株式会社 | 車両用前照灯 |
FR3048219B1 (fr) * | 2016-02-26 | 2020-12-25 | Valeo Vision | Dispositif d'eclairage pour vehicule avec presentation d'information d'aide a la conduite |
JP6811554B2 (ja) * | 2016-06-15 | 2021-01-13 | 株式会社小糸製作所 | 車両用灯具 |
KR101830663B1 (ko) * | 2016-07-06 | 2018-02-21 | 엘지전자 주식회사 | 차량용 램프 및 그것의 제어방법 |
-
2018
- 2018-04-03 FR FR1852899A patent/FR3079467A1/fr active Pending
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2019
- 2019-04-03 US US17/044,708 patent/US11370352B2/en active Active
- 2019-04-03 WO PCT/EP2019/058439 patent/WO2019193074A1/fr unknown
- 2019-04-03 JP JP2020554124A patent/JP7339716B2/ja active Active
- 2019-04-03 EP EP19715476.8A patent/EP3775675A1/fr active Pending
- 2019-04-03 CN CN201980036714.9A patent/CN112236617B/zh active Active
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CN112236617B (zh) | 2023-05-05 |
US11370352B2 (en) | 2022-06-28 |
WO2019193074A1 (fr) | 2019-10-10 |
FR3079467A1 (fr) | 2019-10-04 |
US20210070219A1 (en) | 2021-03-11 |
JP2021533522A (ja) | 2021-12-02 |
CN112236617A (zh) | 2021-01-15 |
JP7339716B2 (ja) | 2023-09-06 |
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