EP3628914A1 - Optische bifunktionseinheit zum anzeigen und beleuchten - Google Patents

Optische bifunktionseinheit zum anzeigen und beleuchten Download PDF

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Publication number
EP3628914A1
EP3628914A1 EP19198118.2A EP19198118A EP3628914A1 EP 3628914 A1 EP3628914 A1 EP 3628914A1 EP 19198118 A EP19198118 A EP 19198118A EP 3628914 A1 EP3628914 A1 EP 3628914A1
Authority
EP
European Patent Office
Prior art keywords
diopter
optical
cut
optical unit
optical part
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
Application number
EP19198118.2A
Other languages
English (en)
French (fr)
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EP3628914B1 (de
Inventor
Yves Gromfeld
Nicolas VIOLET
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
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Valeo Vision SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP3628914A1 publication Critical patent/EP3628914A1/de
Application granted granted Critical
Publication of EP3628914B1 publication Critical patent/EP3628914B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • 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
    • 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
    • F21S41/141—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
    • 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
    • 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]
    • 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 lighting devices, in particular of a motor vehicle.
  • the light beams having different light functions are often produced by different optical modules.
  • optical modules allowing, thanks to a tilting cover, to perform a low beam or high beam function with the same light source and the same optical module.
  • such modules require at least one actuator and a specific mechanical device.
  • DRL Day Running Light
  • 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 light beam with cut-off.
  • 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, have two distinct light signatures depending on whether they operate during the day, with the lighting function, or at night, with the DRL.
  • Such a light device can be bulky and difficult to be installed in tight spaces offered in particular by a city motor vehicle.
  • the technical problem which the invention aims to solve is therefore to produce an optical means for a light device, making it possible to reduce the size of said device and to carry out different light functions having the same light signature, and this without needing the mechanical means of transition from one function to another.
  • the cut-off member is arranged so as to stop or reflect at least part 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 cut-off member, while the second collimator is arranged so as to send the second light beam on both sides of the cut-off member.
  • 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 beam can be projected from the same projection system.
  • the cut-off beam can be a passing beam while the uninterrupted 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 outlet surface, have an identical lit appearance.
  • the cut-off beam can be a passing beam and the uninterrupted beam can be a DRL, thus making it possible to obtain the same light signature by day as by 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 light device may have a reduced volume, therefore be more compact compared to the device of the state of the art.
  • the invention also relates to a motor vehicle light device, in particular a vehicle headlight, 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 housing in which said optical unit is housed.
  • the internal face of the housing is coated with a metallic layer.
  • the metal layer can be an aluminum layer deposited on the internal face of the housing by an aluminizing process.
  • the metallic layer makes it possible to improve the homogeneity of the light beam generated by the optical unit, in particular of the signaling beam. The quality of the beam is made better.
  • the internal face of the housing can be coated with a layer of white color, in particular 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 from 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 propagation of the light 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 in which light is emitted out of the optical unit.
  • the terms "front” and “rear” are defined mainly with respect to this axis X.
  • 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.
  • 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 also 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 is supported 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 the first light source 12.
  • a first light source 12 is placed opposite the input 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 diopter.
  • the first beam F1 the light beam from this source 12
  • the input diopter of the first collimator 11 is also called the primary input diopter.
  • the second optical part 20 also includes a collimator 21, called the second collimator 21, opposite which are positioned several light sources, hereinafter called second light sources 22.
  • 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 next to 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 produced on a lower face 23 of the second optical part 20.
  • the second light sources 22 are arranged in a row along the of the notch 29.
  • first and second optical parts 10 and 20 are positioned with respect to each other so that the first and second light sources 12, 22 can be positioned in the same flat support, such as 'a radiator top surface, or as here, on a flat printed circuit board 8.
  • 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 comprises a cut-off member 3 located between the ends 15a and 15b.
  • the cut-off member 3 is a cut-off diopter 32.
  • the cut-off diopter 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 diopter 32 may be in a lower portion of the body 15, in particular closer to the first end 15a.
  • the cut-off diopter 32 includes 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 cutting edge 31.
  • the projection portion 4 comprises a first portion 4a projecting rearward so as to form a nose 43.
  • This the 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, intersects with the cutting diopter 32 at the level of the cutting edge 31.
  • the first portion 4a further comprises a second face situated downstream and facing the cutting edge 31. Said second face forms a return diopter 41 operating in total internal reflection so as to reflect the rays which reach it towards a terminal output diopter 42.
  • the terminal output diopter 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 convergent system with a line or a focal surface, so that the cutting edge 31 is arranged in this line or this surface focal.
  • the main body 15 further comprises a raised portion 6 placed, here in the rear, and between the first end 15a and the second end 15b.
  • the raised portion 6 is located upstream from the cutting edge 31.
  • the raised portion 6 is located on the same side and upstream of the cut-off diopter 32. Specifically, the raised portion 6 is located between the cut-off diopter 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 diopter 32 and extends to the first end 15a.
  • the raised portion 6 comprises an increasing section in the direction of the first end 15a. It comprises a lower base 52 forming a second secondary input diopter 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 the dioptres of primary inputs 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 details of the course of these rays will be described later.
  • the Figures 4 and 5 represent respectively the front and the rear of the second optical part 20.
  • the second optical part 20 comprises an upper face 24, situated opposite the second collimator 21 in the direction Z.
  • the upper face 24 forms a first intermediate output diopter 24.
  • the second optical part 20 further comprises a recess 7 having a shape complementary to that of the raised portion 6 of the first optical part 10 so that the portion in relief 6 is housed in the hollow 7.
  • the recess 7 is produced in a front face 23 of the second optical part 20.
  • the recess 7 comprises a bottom forming a second intermediate output diopter 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 output diopter 24 is placed at an optimal distance from the first secondary input diopter 51.
  • This optimal distance allows the majority of the light rays exiting from said first output diopter 24 to enter the block of the first optical part 10 through the first intermediate input diopter 24. In other words, this optimal 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 positioning of the optical parts 10 and 20, also called centering, is obtained in particular by fixing each of these parts on the common support, here, the printed circuit board 8 ..
  • the raised portion 6 comprises a first primary lateral face 61 and a second primary lateral face 62.
  • the recess 7 also comprises two lateral faces, including a first secondary lateral face 71 and a second secondary lateral face 72.
  • the first primary lateral face 61 and the first secondary lateral face 71 are face to face and in contact all along.
  • the same is true for the second primary side face 62 and the second secondary side face 72.
  • the hollow does not include the lateral faces. This therefore simplifies the manufacture of the hollow.
  • the oblique arrangement of these lateral faces allows the first optical part 10 to rest on the lateral faces of the second optical part 20.
  • the figure 7 schematically illustrates the path of the first light beam F1.
  • the light rays arrive at the cutting edge 31 are represented by arrows in broken lines and the point of which ends in a triangle.
  • the other rays are represented by arrows in solid line and whose point ends in a triangle.
  • part of the first beam F1 is sent directly to the return diopter 41, which then reflects these rays towards the terminal exit diopter 42, from which these rays exit by refraction inclined towards the low relative to the optical axis A of the optical unit 1.
  • the first beam F1 forms a lower portion C of an illumination beam having a lower cut line C1, image of the cut edge 31.
  • the lower cut line C1 is a relatively horizontal line on the left and with an oblique portion on the right.
  • Said light beam is represented by 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 diopter 32 therefore forms a folder 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 arrive at the cutting edge 31 are represented by arrows in broken lines and the point of which ends in a triangle.
  • the other rays are represented by arrows in solid line and whose point ends in a triangle.
  • the second collimator 12 is arranged so as to allow the entry of most of the second beam F2 to inside the second optical part 20 and 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 one another and which are sent to the first intermediate output diopter 24.
  • Said first output diopter 24 is arranged so as to send certain light rays from the first part 12 1 to the first intermediate input diopter 51. These rays then reach the return diopter 41, which reflects these rays towards the output diopter terminal 42, from which the rays emerge by refraction inclined upwards relative to the optical axis A.
  • a second part 12 2 of the second beam F2 is sent to the second intermediate output diopter 26 and enters by refraction in the first optical part 10 through the second intermediate input diopter 52.
  • the second part 12 2 of the second beam F2 first crosses the raised portion 6.
  • the latter therefore has, here, a function of guiding the light rays.
  • Certain light rays of the second part 12 2 then reach the return diopter 41, which reflects them towards the terminal exit diopter 42, from which the rays exit by refraction inclined downward relative to the optical axis A.
  • Some of the other light rays of the second part 12 2 are sent to the cutting edge 31. Then, they respectively reach the reference diopter 41 and by reflection the terminal output diopter 42, from which these rays emerge by refraction parallel to the optical axis A.
  • the second beam F2 forms a signaling beam F s as illustrated in the figure 10 , such as a beam having a daytime running light function.
  • This beam includes a lower portion C3 and an upper portion C4.
  • the lower portion C3 is generated from the rays of the second beam passing through the second intermediate output diopter 26 and through the second secondary input diopter 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 output diopter 24 and by the first secondary input diopter 51. As illustrated in the figure 8 , these spokes pass through a second side, here, behind, the cutting edge 31.
  • the second beam F2 is sent to the two sides of the cutting 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 in front and another part behind the cut-off edge 31.
  • Such a distribution is combined with the arrangement of the projection system 4, integrated into the first optical part 10, to create an unbroken beam whose light signature is the same as the cut beam generated by the first optical part 10 in conjunction with the first light source 12.
  • the cut 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 housing 9, as illustrated on the figure 12 .
  • the housing 9 with the radiator 30 together form a housing for the optical unit 1.
  • the housing 9 includes an opening 91 disposed opposite the terminal output diopter 42 when the housing 9 is mounted on the radiator.
  • the shape of the opening is similar to that of the contour of the terminal output diopter 42.
  • the housing 9 comprises an internal face 90 covered with a metallic coating.
  • the metal coating can be a thin layer of aluminum.
  • This metallic coating makes it possible to obtain a uniform illumination of the light beam, in particular of the signaling beam generated by the optical unit 1.
  • the metal coating can be replaced by a white coating to also obtain a uniform 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)
EP19198118.2A 2018-09-28 2019-09-18 Optische bifunktionseinheit zum anzeigen und beleuchten Active EP3628914B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1858995A FR3086728B1 (fr) 2018-09-28 2018-09-28 Unite optique bifonction signalisation et eclairage

Publications (2)

Publication Number Publication Date
EP3628914A1 true EP3628914A1 (de) 2020-04-01
EP3628914B1 EP3628914B1 (de) 2022-01-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19198118.2A Active EP3628914B1 (de) 2018-09-28 2019-09-18 Optische bifunktionseinheit zum anzeigen und beleuchten

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EP (1) EP3628914B1 (de)
FR (1) FR3086728B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024133349A1 (fr) * 2022-12-21 2024-06-27 Valeo Vision Module lumineux pour système d'éclairage d'un véhicule

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4914747A (en) * 1988-06-28 1990-04-03 Koito Seisakusho Co, Ltd. Vehicular headlamp
US20070086202A1 (en) * 2005-10-13 2007-04-19 Koito Manufacturing Co., Ltd. Lamp unit of vehicle headlamp
EP2187115A2 (de) * 2008-11-12 2010-05-19 Koito Manufacturing Co., Ltd. Fahrzeuglampe
US20120113665A1 (en) * 2010-11-05 2012-05-10 Koito Manufacturing Co., Ltd. Vehicle lighting apparatus
FR3039883A1 (fr) 2015-08-06 2017-02-10 Valeo Vision Module lumineux en materiau transparent avec deux faces de reflexion
EP3299703A1 (de) * 2016-09-26 2018-03-28 Valeo Vision Bifunktionales beleuchtungsmodul aus transparentem material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4914747A (en) * 1988-06-28 1990-04-03 Koito Seisakusho Co, Ltd. Vehicular headlamp
US20070086202A1 (en) * 2005-10-13 2007-04-19 Koito Manufacturing Co., Ltd. Lamp unit of vehicle headlamp
EP2187115A2 (de) * 2008-11-12 2010-05-19 Koito Manufacturing Co., Ltd. Fahrzeuglampe
US20120113665A1 (en) * 2010-11-05 2012-05-10 Koito Manufacturing Co., Ltd. Vehicle lighting apparatus
FR3039883A1 (fr) 2015-08-06 2017-02-10 Valeo Vision Module lumineux en materiau transparent avec deux faces de reflexion
EP3299703A1 (de) * 2016-09-26 2018-03-28 Valeo Vision Bifunktionales beleuchtungsmodul aus transparentem material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024133349A1 (fr) * 2022-12-21 2024-06-27 Valeo Vision Module lumineux pour système d'éclairage d'un véhicule
FR3144077A1 (fr) * 2022-12-21 2024-06-28 Valeo Vision Module lumineux pour système d’éclairage d’un véhicule

Also Published As

Publication number Publication date
FR3086728B1 (fr) 2021-07-30
EP3628914B1 (de) 2022-01-12
FR3086728A1 (fr) 2020-04-03

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