EP4405616A1 - Bloc optique pour projecteur de véhicule automobile - Google Patents
Bloc optique pour projecteur de véhicule automobileInfo
- Publication number
- EP4405616A1 EP4405616A1 EP22755261.9A EP22755261A EP4405616A1 EP 4405616 A1 EP4405616 A1 EP 4405616A1 EP 22755261 A EP22755261 A EP 22755261A EP 4405616 A1 EP4405616 A1 EP 4405616A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- optical unit
- row
- parabolic reflectors
- additional
- parabolic
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
- F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/36—Combinations of two or more separate reflectors
-
- 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
- F21S41/39—Attachment thereof
-
- 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
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
- F21S41/26—Elongated lenses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
- F21S41/265—Composite lenses; Lenses with a patch-like shape
-
- 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
- F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
- F21W2102/19—Arrangement or contour of the emitted light for regions other than high beam or low beam for curves
Definitions
- Optical unit for motor vehicle headlight Optical unit for motor vehicle headlight.
- the present invention claims the priority of French application 2109963 filed on 09.22.2021, the content of which (text, drawings and claims) is incorporated herein by reference.
- the invention generally relates to headlamps for motor vehicles and is more particularly concerned with optical units for headlamps integrating several lighting functions in the same box.
- the SBL function supplements the lighting provided by the dipped beam and main beam functions, on the sides of the road, depending on the speed of the vehicle and the steering angle of the steering wheel.
- the advantage of this function is to improve the driver's visibility, at night, on bends and in particular on the inside of bends.
- an optical module dedicated to the SBL function, hereinafter referred to as SBL module, is arranged alongside other optical modules dedicated respectively to the dipped beam and main beam functions, in each of the vehicle's headlamps. .
- the SBL module is generally placed, in the headlamp, closest to the longitudinal axis of the vehicle.
- the SBL module is then oriented towards the outside of the vehicle with an orientation making it possible to point the light beam generated by the SBL module towards the sides of the road.
- An optical block is generally made up of a box closed by a lens or glass transparent to light.
- the box contains and supports at least one light source such as a light-emitting diode, designated by the Anglo-Saxon acronym LED (Light-Emitting Diode), located on an electronic card, and a parabolic or other reflector, making it possible to direct the beam light generated by the LED towards the lens or the glass closing the case.
- a light-emitting diode designated by the Anglo-Saxon acronym LED (Light-Emitting Diode)
- LED Light-Emitting Diode
- Such an optical unit can be equipped with or be associated with a mask having the function of hiding the technical areas vis-à-vis an observer located in front of the vehicle.
- the technical areas include in particular the electronic cards and other components or mechanical elements involved in the formation of the light beams and their orientation. It is also known to integrate the dipped beam and main beam functions in the same box by sharing the same electronic card supporting the LEDs.
- the addition of the SBL function in addition to the lighting functions already installed in a headlamp which has been the subject of an initial development may require costly adjustments (addition of a reflector, an electronic card supporting one or more LEDs, a mask, etc. and/or require space which is not always available in the box.
- the object of the present invention is to provide an inexpensive solution making it possible to add the SBL function to an already existing optical unit in a motor vehicle headlamp, without impacting the volume of the optical unit or the perceived quality of the optical unit, seen from outside the vehicle, when the SBL function is not activated.
- the present invention has as its first object, an optical unit for a motor vehicle headlamp, comprising a housing closed by an optical lens, said housing comprising a first row of parabolic reflectors and a second row of parabolic reflectors, adjacent to the first row and extending said first row in the same transverse direction of the case; said parabolic reflectors of the first and second rows being shaped to be able to respectively reflect light rays, emitted by a plurality of light sources, outside the case through the lens in first and second determined directions to respectively form a light beam from the “Fiat” lighting function and a light beam from the “Spot” lighting function; said optical unit further comprising an additional parabolic reflector located near the junction between the first and second rows of parabolic reflectors, being shaped to be able to reflect light rays, emitted by at least one additional light source, through the lens following a direction transverse to that of the rays of the Fiat beam to form a light beam of the SBL lighting function.
- the parabolic reflectors of the first and second rows as well as the additional parabolic reflector all belong to the same transverse wall of the box, obtained at the same time as the molding of the box.
- the rays emitted by the additional light source pass through the lens in a part of the lens located in the vicinity of the side edge of the case.
- the second row of parabolic reflectors is set back from the first row of parabolic reflectors with respect to the lens.
- the additional parabolic reflector comprises a concave rear face oriented towards the second row of parabolic reflectors.
- the first row of parabolic reflectors comprises five adjacent parabolic reflectors and in which the second row of parabolic reflectors comprises two adjacent parabolic reflectors.
- the light sources are LEDs.
- a second object of the invention is a motor vehicle headlamp comprising at least one optical unit as described above.
- the last subject of the invention is a motor vehicle comprising at least one headlamp as described above.
- FIG.1 illustrates a side view of a motor vehicle headlight optical unit, according to the invention
- FIG.2 illustrates a top view of the optical block according to the invention
- FIG.3 illustrates the optical unit according to the invention, in a top view in section along the section axis lll-lll of Figure 1
- FIG.4 illustrates the optical unit according to the invention, in a side view in section along the section axis IV-IV of Figure 2
- FIG.3 illustrates the optical unit according to the invention, in a top view in section along the section axis lll-lll of Figure 1
- FIG.4 illustrates the optical unit according to the invention, in a side view in section along the section axis IV-IV of Figure 2
- Figure 2 illustrates the optical unit according to the invention, in a side view in section along the section axis IV-IV of Figure 2
- FIG.5 illustrates a regulatory diagram of illumination of dipped and cornering lights to which the optical unit according to the invention is subject.
- the optical unit shown in the figures, is oriented as mounted inside a vehicle headlamp itself mounted in a motor vehicle.
- the optical unit therefore adopts the same orthonormal XYZ reference frame as that of the vehicle.
- Identical elements of the optical block are designated by the same alphanumeric references.
- the orthonormal reference XYZ to identify the directions of extension of the vehicle and the associated relative concepts, including a longitudinal direction (along X), a transverse direction (along Y) and a vertical direction (according to Z).
- the longitudinal direction X extends between the front and the rear of the vehicle
- the transverse direction Y extends between the right and left lateral sides of the vehicle identified with respect to the driver in the driving position of the vehicle
- the vertical direction Z defines the extension of the vehicle in elevation from its rolling plane on the ground.
- Figure 1 illustrates a side view of an optical unit 1 and Figure 2 the same optical unit 1 in a top view.
- the optical block 1 considered in Figures 1 and 2 is located in the left headlight of the vehicle.
- the projector and the vehicle are not shown.
- the optical block of the right headlamp, also not shown, is identical and symmetrical with respect to the vertical median plane of the vehicle.
- the optical unit 1 comprises a box 2 closed in its front part by a lens 3.
- the box 2 of the optical unit 1 incorporates a plurality of mechanical, optical, electronic and heat dissipation components.
- the case 2 comprises in its front part 20 an upper compartment 21, a central compartment 22 and a lower compartment 23.
- the central compartment 22 and the lower compartment 23 house the components dedicated to “cut/pixel” type low beam lighting functions and a “matrix” type high beam lighting function.
- the "Fiat" beam, Fflat is obtained from a first row 40 of five parabolic reflectors 41 -45 of substantially identical shape and size, hereinafter referred to as "parabolas”.
- the five parabolas 41 - 45 are arranged adjacently and are aligned, along their width, in a direction transverse to the vertical median plane PM of the box 2 (along X). They extend between the left side edge of the compartment 21 and the vertical median plane PM of the box 2.
- the "Spot" beam, Fspot is obtained from a second row 50 of two parabolas 51 -52 of substantially identical size and shape.
- the two parabolas 51 -52 are arranged adjacently and are aligned, along their width, in a direction transverse to the vertical median plane PM of the box 2 (along X). They extend from the vertical median plane PM of the upper compartment 21 of the box 2 of the optical unit 1 (along X) to the right side edge of the compartment 21.
- the first and second rows 40 and 50 of parabolas are obtained by molding with the box 2 and define a single and same wall 6 extending substantially perpendicularly (along Y) to the side walls of the upper compartment 21 of the box 2.
- the wall 6 is thus shaped to define the seven parabolas 41 -45 and 51 -52.
- an electronic card 70 is arranged in the upper compartment 21. It is common to the two rows of parabolas 40 and 50 and supports the five light sources, five LEDs 71 -75, arranged opposite the parabolas of the first row 40 and the two light sources, two LEDs 76-77 arranged opposite the parabolas of the second row of parabolas 50.
- the LEDs 71 -75 and 76-77 dedicated respectively to the parabolas 41 - 45 and 51 -52 of the first and second rows 40 and 50 emit light rays towards their respective parabolas 41 -45 and 51 -52.
- the LEDs although numbered in the description, have not been represented or referenced in the figures with the exception of the LED 73 in figure 4 which is dedicated to the parabola 43.
- the parabolas 41 -45 of the first row of parabolas 40 are positioned, dimensioned and oriented so as to respectively reflect the rays R1 emitted by each of the five LEDs 71 -75, along their main optical axes, through a first lateral part 31 of the lens 3 located opposite the first row of parabolas 40, at a first determined distance from the first row of parabolas 40.
- the parabolas 51 -52 of the second row of parabolas 50 are dimensioned and oriented so as to respectively reflect the rays R2 emitted by each of the two LEDs 76-77, along their main optical axes, through a second lateral part 32 of the lens 3 located opposite the second row, at a second determined distance from the second row of parabolas 50.
- the parabolas of the first row 40 have a smaller size than the second row 50 and the second row of parabolas 50 is offset, substantially set back from the first row 40, with respect to the lens 3.
- the second distance is therefore greater than the first distance.
- the first row of parabolas 40 comprises five parabolas 41 -45 and the second row of parabolas 50 comprises two parabolas 51 -52.
- All of the beams R1 and R2 must comply with a regulatory illumination diagram for the "Fiat”, Fflat, and “Spot”, Fspot type dipped headlight beams, as shown in figure 5.
- the projection of the Fspot beam is concentrated in the center of the diagram while the projection of the Fflat beam extends widely on either side of the vertical axis of the diagram passing through the center of the projector.
- the horizontal axis corresponds to the horizon line in relation to the projector.
- the Fiat and Spot beam projections are localized below the horizontal axis.
- the width of the beams Fflat and Fspot is determined (along the horizontal axis of the diagram) respectively by the first and second rows of parabolas 40 and 50.
- the contribution of the SBL function appears on the left of the diagram by widening the projection width of the Fflat beam on the left (lower left side).
- the installation of an SBL module fulfilling the SBL function, in the optical block 1 which has just been described, must therefore comply with the regulatory illumination diagram without modifying the dimensions of the box 2 and in particular the width of the box 2 (according to Y).
- the solution according to the invention consists in installing an additional parabola 60 (Fig. 2 and 3) in the extension of the first row of parabola 40, after the parabola 45 which is adjacent to the parabola 51 of the second row of parabolas 50, without modifying the layout of the first and second rows 40 and 50.
- the additional parabola 60 is obtained by molding at the same time as the molding of the wall 6, shaped to define the parabolas of the first and second rows 40 and 50.
- the additional parabola 60 extends in the vicinity of the junction between the first 40 and the second 50 rows of parabolic reflectors 40 and 50 advancing towards the lens 3. Its main optical axis is oriented towards the part 31 of the lens 3 which joins the left side edge of the lens 3.
- the rear face of the additional parabola 60 is curved towards the parabola 51 which is adjacent to the parabola 45, without impacting the radiation diagram of the rays R2 and therefore without impacting the diagram of illumination corresponding to the beam Fspot.
- the additional parabola 60 appears globally, with reference to FIG. 3, as an inverted “cedilla”, hung between the parabola 45 and the parabola 51 while being substantially centered on the vertical median plane PM.
- An additional LED 78 is attached to the common electronic card 70 supporting the previous seven LEDs 71 -77, being arranged opposite the additional parabola 60
- the additional LED 78 emits light rays R3 which are reflected by the parabola additional 60 in directions determined along the main optical axis of the additional parabola 60.
- the SBL module mainly comprises the additional reflector 60 and the additional diode 78.
- the rays R3 emitted by the additional LED 78 are reflected in a direction transverse to that of the rays R1 (Fflat beam) to pass through the lens 3 in a part 31 of the lens 3 located in the vicinity of the left side edge of the case 2.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2109963A FR3127275B1 (fr) | 2021-09-22 | 2021-09-22 | Bloc optique pour projecteur de véhicule automobile. |
| PCT/FR2022/051485 WO2023047027A1 (fr) | 2021-09-22 | 2022-07-25 | Bloc optique pour projecteur de véhicule automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4405616A1 true EP4405616A1 (fr) | 2024-07-31 |
| EP4405616B1 EP4405616B1 (fr) | 2025-08-27 |
Family
ID=79601777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22755261.9A Active EP4405616B1 (fr) | 2021-09-22 | 2022-07-25 | Bloc optique pour projecteur de véhicule automobile |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4405616B1 (fr) |
| CN (1) | CN118043588A (fr) |
| FR (1) | FR3127275B1 (fr) |
| WO (1) | WO2023047027A1 (fr) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2049214C3 (de) | 1970-10-07 | 1975-11-13 | Daimler-Benz Ag, 7000 Stuttgart | Stützkörper für Hohlträger von Kraftfahrzeugkarosserien an Befestigungsstellen von Aggregaten |
| DE19813032A1 (de) * | 1998-03-25 | 1999-09-30 | Bosch Gmbh Robert | Scheinwerferanlage für Fahrzeuge zur Aussendung veränderlicher Lichtbündel |
| JP4529946B2 (ja) * | 2006-06-01 | 2010-08-25 | 市光工業株式会社 | 車両用灯具 |
| JP5304363B2 (ja) * | 2009-03-18 | 2013-10-02 | 市光工業株式会社 | 車両用灯具 |
| CN106641944A (zh) * | 2015-10-30 | 2017-05-10 | 法雷奥照明湖北技术中心有限公司 | 用于机动车辆的照明装置及机动车辆 |
| FR3056688B1 (fr) * | 2016-09-26 | 2018-11-02 | Valeo Vision | Module d'eclairage bi-fonction en materiau transparent |
| KR102694059B1 (ko) * | 2019-09-20 | 2024-08-09 | 현대모비스 주식회사 | 헤드램프의 광학모듈 |
-
2021
- 2021-09-22 FR FR2109963A patent/FR3127275B1/fr active Active
-
2022
- 2022-07-25 CN CN202280064207.8A patent/CN118043588A/zh active Pending
- 2022-07-25 WO PCT/FR2022/051485 patent/WO2023047027A1/fr not_active Ceased
- 2022-07-25 EP EP22755261.9A patent/EP4405616B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023047027A1 (fr) | 2023-03-30 |
| CN118043588A (zh) | 2024-05-14 |
| FR3127275B1 (fr) | 2023-08-11 |
| FR3127275A1 (fr) | 2023-03-24 |
| EP4405616B1 (fr) | 2025-08-27 |
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