EP3604905B1 - Dispositif lumineux pour vehicule automobile - Google Patents

Dispositif lumineux pour vehicule automobile Download PDF

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Publication number
EP3604905B1
EP3604905B1 EP19020459.4A EP19020459A EP3604905B1 EP 3604905 B1 EP3604905 B1 EP 3604905B1 EP 19020459 A EP19020459 A EP 19020459A EP 3604905 B1 EP3604905 B1 EP 3604905B1
Authority
EP
European Patent Office
Prior art keywords
light
connecting bridge
light rays
luminous device
optical element
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.)
Active
Application number
EP19020459.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3604905A1 (fr
Inventor
Emeric MUDRY
Frédéric LUU
Arnaud Montheard
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 Belgique SA
Original Assignee
Valeo Vision Belgique SA
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 Belgique SA filed Critical Valeo Vision Belgique SA
Publication of EP3604905A1 publication Critical patent/EP3604905A1/fr
Application granted granted Critical
Publication of EP3604905B1 publication Critical patent/EP3604905B1/fr
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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/27—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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F21S43/145—Surface emitters, e.g. organic light emitting diodes [OLED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • 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
    • F21W2103/35—Brake lights
    • 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]
    • 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]
    • F21Y2115/15—Organic light-emitting diodes [OLED]

Definitions

  • the present invention relates to a lighting device for a motor vehicle.
  • the light device is configured to be mounted on the rear window of a motor vehicle.
  • a drawback of this state of the prior art is that due to the presence of said at least one connecting bridge, the light rays from said at least one light source are deflected which creates shadow areas, referenced S on the figure 1 (on which the light is represented in black and the shaded areas in white), which can be observed by a person looking at the rear window of the motor vehicle.
  • the connecting bridge is thus the site of light losses as well as inhomogeneities in the light beam formed by the light rays.
  • EP 2 317 214 A1 , DE 10 2011 002483 A1 , US 2013/021815 A1 and EP 2 587 120 A1 disclose light devices known from the prior art.
  • the present invention aims to propose a luminous device for a motor vehicle which makes it possible to solve the drawback mentioned.
  • said at least one connecting bridge comprises at least one optical structure with an input face substantially perpendicular to part of the light rays passing through said primary optical element, said output face of said secondary optical element comprising prisms at of said at least one connecting bridge so as to straighten along said optical emission axis the light rays coming from said secondary optical element after having crossed the connecting bridge.
  • the light rays which have passed through the primary optical element will propagate through said at least one connecting bridge to the output face of the optical element. secondary with minimal refraction so there is very little light loss and no shadow areas at the connecting bridge. The light is thus diffused evenly.
  • the luminous device 1 for a motor vehicle according to the invention is described with reference to the figures 2 to 7 .
  • Motor vehicle means any type of motorized vehicle.
  • the light device 1 is a traffic light.
  • the figure 2 is a view of the rear of a motor vehicle 2.
  • the motor vehicle 2 comprises a rear window 3, the latter possibly being fixed to the bodywork or being on a rear opening such as a rear hatch .
  • the light device 1 is arranged at the top of the rear window 3. In one non-limiting embodiment, it is a stop light, commonly called “third stop light”, or raised stop light, in reference to the two classic stop lights arranged lower on the left and on the right.
  • the “third stop light” or high-mounted stop light is also designated CHMSL, an acronym for the English expression “Center High-Mounted Stop Light”.
  • Such a raised brake light can also be installed at the bottom of the rear window, on the parcel shelf or mounted in the bodywork, above the rear window or even at the top of the trunk.
  • the light device 1 is configured to be placed behind the rear window 3. In this case, it comprises a case whose opening is closed by the rear window.
  • the light device 1 is configured to be integrated into the bodywork. In this case, it comprises a box closed by an outlet lens.
  • This non-limiting embodiment is taken as a non-limiting example in the remainder of the description.
  • the luminous device 1 extends along a main direction Y (illustrated on the figures 2 and 3a ) which corresponds to the horizontal when it is in the mounting position on the motor vehicle 2.
  • the light device 1 illuminates in a direction longitudinal to the motor vehicle 2 oriented towards the rear and along an optical emission axis X (illustrated on the figure 4 ) close to the horizontal, so that an observer located in the optical emission axis X and close to this optical emission axis X can see the light beam emitted by the light device 1.
  • the elements of the light device 1 are described in detail below.
  • the housing 10 is configured to receive the support 12 with said at least one light source 13, and the optical system 14.
  • the luminous device 1 is held in the motor vehicle 2 by means of its casing.
  • the latter is fixed to the body via holes (not shown) made in the body.
  • the exit lens 11 is configured to close the case 10 in a dust- and moisture-tight manner.
  • said exit lens 11 is glued to said casing 10.
  • the exit glass 11 is configured to be pressed against the rear window 3. In one non-limiting embodiment, it is held on the body of the motor vehicle 2 by means of an adhesive film 110 illustrated on the picture 3a . This makes it possible to maintain the whole of the luminous device 1 in the motor vehicle 2.
  • the output glass 11 is composed of a face facing outwards through which the light beam of the light device 1 emerges.
  • the outlet lens 11 is transparent or translucent. It can be tinted red. It has no opaque wall.
  • Bracket 12 is shown in the figure 3b and 4 .
  • the support 12 comprises at least one light source 13 configured to emit light rays R.
  • It includes a 120 electrical connector (shown on the figure 4 ) which makes it possible to connect it electrically to an electrical network of the motor vehicle 2.
  • the support 12 is a printed circuit support, also designated PCBA, an acronym for the English expression “Printed Circuit Board Assembly”.
  • said light source 13 is a semiconductor light source.
  • said semiconductor light source 13 forms part of a light-emitting diode.
  • light-emitting diode we mean any type of light-emitting diode, whether in non-limiting examples LED (“Light Emitting Diode”), OLED (“organic LED”), AMOLED (Active-Matrix-Organic LED), or FOLED (Flexible OLED).
  • Said light source 13 is configured to generate a light ray R in a direction parallel to the optical emission axis 12 of the light device 1.
  • the light device 1 comprises a plurality of light sources 13. In the non-limiting example illustrated in the figure 3b , it comprises 16 light sources 13. This non-limiting embodiment is taken as a non-limiting example in the remainder of the description.
  • the light sources 13 are arranged side by side and distributed along the main direction Y of the light device 1.
  • the light sources 13 are configured to generate light rays R which will cooperate with the optical system 14 described below. All of the light rays R of the light sources 13 form the light beam F of the light device 1. For the sake of simplification, only the light rays R of a few light sources 13 have been represented on the figure 3b .
  • the optical system 14 is illustrated in the figures 3b to 7 .
  • the optical system 14 is configured to form a light beam F along the optical emission axis X from the light rays R of the light sources 13.
  • It is thus configured to distribute the light rays R coming from the light sources 13 so that the light beam F which comes out of the output lens 11 is as homogeneous as possible.
  • the optical system 14 is secured to the support 12 and kept at a distance from said support 12. In one non-limiting embodiment, it is secured to the support 12 with at least one clip 145 (illustrated on the figure 4 and 5b ). In a non-limiting embodiment variant, it comprises a plurality of fixing clips 145.
  • the optical system 14 comprises 4 fixing clips, two of which are distributed on one side of the optical system and two others on the opposite side, so as to have better fixing of the support 12.
  • the optical system 14 is a single piece.
  • the optical system 14 is made of synthetic polymer material.
  • the optical system 14 is produced by injection molding of synthetic polymer material.
  • the material is polycarbonate (PC) or polymethyl methacrylate (PMMA).
  • the primary optical element 140 is illustrated in the figures 3b to 7 .
  • FIG. 5a it comprises a windscreen 143 which cooperates with a light source 13 to collimate the light rays R generated in the direction of the secondary optical element 141 and in the direction of the connecting bridges 142 distributed on either side of the light source 13.
  • Windscreen 143 is placed facing a light source 13.
  • Windscreen 143 is curved.
  • the bonnet 143 is curved over a sector between 90° and 180° so as to collect a major part of the light rays R emitted by the light source 13.
  • Windscreen 143 includes an entry face 143a and an exit face 143b.
  • the entry face 143a and the exit face 143b are smooth.
  • the input face 143a comprises Fresnel steps. The two non-limiting embodiments make it possible to collimate substantially vertically the light rays R coming from the light sources 13 towards the secondary optical element 141, namely perpendicular to the Y axis, and horizontally said light rays R towards the secondary optical element 141, namely along a plane parallel to the Y axis.
  • the primary optical element 140 comprises a plurality of windscreens 143. In the non-limiting example illustrated on the figure 3b , it comprises 16 windshields 143 each cooperating respectively with the 16 light sources 13.
  • the secondary optical element 141 is illustrated in the figures 3b to 7 .
  • the secondary optical element 141 is arranged facing the primary optical element 140 so as to receive the light rays R collimated by the primary optical element 140.
  • the primary optical element 140 is placed between the primary optical element 140 and the output lens 11. Like the primary optical element 140, it is formed from a transparent or translucent material, similar to a lens.
  • the input face 141a is oriented towards the light sources 13. As illustrated in the figure 5a , it includes Fresnel 141c steps. The latter are configured to vertically collimate the light rays R coming from the light sources 13 and having passed through the windshield 143 so that on the exit face 141b the light rays R are oriented parallel to the optical emission axis X.
  • the Fresnel steps extend substantially vertically relative to the plane of the secondary optical element 141. In other words, they are perpendicular to the main direction Y.
  • the exit face 141b faces the exit window 11.
  • the light beam F formed by the light rays R leaves the exit window 11 to illuminate the rear of the rear window 3.
  • Link bridge 142 is shown in the figures 3b to 7 .
  • the connecting bridge 142 is configured to secure the two parts of the optical system 14, namely the primary optical element 140 and the secondary optical element 141.
  • the optical system 14 comprises a plurality of link bridges 142. In the non-limiting example illustrated in the figure 4 , it includes 7 connecting bridges 142.
  • said at least one connecting bridge 142 is full. It does not include any openings, as in the case of the figure 5b , which allows it to be more robust and cool evenly.
  • the connecting bridge 142 serves as an injection point to inject the synthetic polymeric material.
  • the optical system 14 includes other connecting bridges 144 illustrated in the figure 4 having an opening 148 illustrated on the figure 5b .
  • These other connecting bridges 144 do not need to have optical patterns 142a because they make it possible to reflect the light rays R coming from the light sources 13 in the direction of the exit face 141b which extends said connecting bridges 144 so that there are no gray areas here.
  • the connecting bridge 142 comprises at least one optical structure 142a.
  • the optical structure 142a comprises an input face 142b substantially perpendicular to a part R1 of the light rays R passing through said primary optical element 140, in particular passing through the windshield 143, so that they propagate with a minimum of refraction through said at least one connecting bridge 142 to said exit face 141b.
  • the input face 142b is perpendicular to the light rays R11 joining the light source 13 at the corner of the connecting bridge 142 with the upper face of the Fresnel steps 141c.
  • a single light ray R11 has been illustrated. These light rays R11 are not deflected by refraction. Others light rays from part R1 are deflected very little by refraction so that there is very little loss of light on the exit face 141c.
  • the optical structure 142a projects from said at least one connecting bridge 142. This makes it possible, while retaining the mass and therefore the resistance of said connecting bridge 142, to add to it a a part R1 of the light rays R to direct them without refraction towards an exit face 141b.
  • the added projecting shape of the optical structure 142a forms a three-sided fin.
  • One of these sides is attached to the connecting bridge 142.
  • Another side is the input face 142b such that a part R1 of the light rays R arrives on it substantially perpendicularly. This allows the R1 portion of the R light rays not to be deflected by refraction as they enter the bonding bridge material 142.
  • the last side is configured to be parallel to the R1 portion of the R light rays. the light rays R do not strike this face and therefore do not modify their trajectory in the connecting bridge 142.
  • the optical structure 142a is made of the same material as the connecting bridge 142 so that the light rays R1 that pass through them are not globally deflected by refraction. Thus, only a small fraction of the light rays R1 will be deflected.
  • the part R1 of the light rays R coming from the light source 13 and having passed through the primary optical element 140 propagates substantially in a straight line with a minimum of refraction through said connecting bridge 142 to the exit face 141b of the secondary optical element 141.
  • said at least one optical structure 142a is of the same thickness e as said at least one connecting bridge 142. This makes it possible to recover all the light rays R propagating in the connecting bridge 142 and to prevent their deflection by refraction so that there are no more gray areas observed at the exit glass 11, due to the absence of light rays R at the level of the connecting bridge 142 on the exit face 141b of the secondary optical element 141. exit 141b which extends connecting bridge 142.
  • a connecting bridge 142 is surrounded by two light sources 13.
  • each connecting bridge 142 is surrounded by two light sources bright 13.
  • the output face 141b comprises prisms 143 at the level of the connecting bridge 142 so as to rectify along the optical emission axis X the light rays R1 originating from the secondary optical element 141.
  • the light rays R1 which have passed through the connecting bridge 142 arrive at the exit face 141b and are straightened by the prisms 143 and oriented parallel to the optical emission axis X.
  • Said prisms 143 are located on the exit face 141b, on the side opposite to that where the connecting bridge 142 is contiguous with the entrance face 141a.
  • said prisms 143 have the same thickness e as said at least one connecting bridge 142. This makes it possible to recover all of the light rays R1 originating from connecting bridge 142.
  • the prisms 143 are oriented so as to refract the light rays R1 coming from the connecting bridge 142 along an axis of movement of the motor vehicle 2, which is parallel to the axis of optical emission X.
  • the prisms 143 s 'extend perpendicular to the main direction Y. It will be noted that the rays R11 seen previously are unfortunately lost.
  • the output face 141b comprises prisms 143 divided into two sets 143a, 143b, one of which 143a is configured to redirect the light rays R1 coming from the first optical structure 142a and the other 143b is configured to redirect the light rays R1 coming from the second optical structure 142a.
  • the right group 143b redirects the light rays R1 coming from the optical structure 142a on the left
  • the left group 143a redirects the light rays R1 coming from the optical structure 142a on the right.
  • said light device 1 is an interior lighting device comprising a case closed by transparent or translucent glass.

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  • 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)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP19020459.4A 2018-08-03 2019-08-02 Dispositif lumineux pour vehicule automobile Active EP3604905B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1857303A FR3084727B1 (fr) 2018-08-03 2018-08-03 Dispositif lumineux pour vehicule automobile

Publications (2)

Publication Number Publication Date
EP3604905A1 EP3604905A1 (fr) 2020-02-05
EP3604905B1 true EP3604905B1 (fr) 2022-07-20

Family

ID=65443916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19020459.4A Active EP3604905B1 (fr) 2018-08-03 2019-08-02 Dispositif lumineux pour vehicule automobile

Country Status (4)

Country Link
EP (1) EP3604905B1 (es)
CN (1) CN110792988B (es)
ES (1) ES2926352T3 (es)
FR (1) FR3084727B1 (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3141231A1 (fr) * 2022-10-25 2024-04-26 Valeo Vision Module optique pour un dispositif lumineux de signalisation
FR3141230A1 (fr) * 2022-10-25 2024-04-26 Valeo Vision Dispositif optique pour un dispositif lumineux de signalisation

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2776595B1 (fr) * 1998-03-31 2000-06-16 Valeo Vision Feu de signalisation comprenant plusieurs sources lumineuses
FR2918439A1 (fr) * 2007-07-02 2009-01-09 Valeo Vision Sa Dispositif lumineux de signalisation pour vehicule automobile
FR2952163B1 (fr) * 2009-11-02 2013-08-23 Valeo Vision Dispositif d'eclairage ou de signalisation pour vehicule automobile comprenant un guide de lumiere
JP5626754B2 (ja) * 2010-01-10 2014-11-19 シチズン電子株式会社 光学ユニット
JP2013026008A (ja) * 2011-07-20 2013-02-04 Koito Mfg Co Ltd 車両用灯具
EP2587120B1 (de) * 2011-10-27 2016-04-13 odelo GmbH Lichtleiterelement und Kraftfahrzeugleuchte mit einem Lichtleiterelement
DE102013212352A1 (de) * 2013-06-26 2014-12-31 Automotive Lighting Reutlingen Gmbh Kraftfahrzeugbeleuchtungseinrichtung mit einer Einkoppeloptik und einer Transport- und Umformoptik
DE202014101954U1 (de) * 2014-04-25 2015-07-28 Zumtobel Lighting Gmbh Optisches Element für eine LED, LED-Anordnung mit einem solchen optischen Element, sowie Leuchte mit einer solchen LED-Anordnung
FR3039630A1 (fr) * 2015-07-28 2017-02-03 Valeo Vision Systeme d'eclairage pour projecteur de vehicule automobile

Also Published As

Publication number Publication date
FR3084727B1 (fr) 2022-01-21
CN110792988B (zh) 2023-05-12
FR3084727A1 (fr) 2020-02-07
EP3604905A1 (fr) 2020-02-05
CN110792988A (zh) 2020-02-14
ES2926352T3 (es) 2022-10-25

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