EP4515141A1 - Dispositif d'éclairage à guide(s) de lumière coudé(s) - Google Patents
Dispositif d'éclairage à guide(s) de lumière coudé(s)Info
- Publication number
- EP4515141A1 EP4515141A1 EP23716644.2A EP23716644A EP4515141A1 EP 4515141 A1 EP4515141 A1 EP 4515141A1 EP 23716644 A EP23716644 A EP 23716644A EP 4515141 A1 EP4515141 A1 EP 4515141A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lighting device
- face
- light guide
- photons
- housing
- 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
- 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
- F21S43/235—Light guides
- F21S43/236—Light guides characterised by the shape of the light guide
- F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
-
- 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
- F21S43/235—Light guides
- F21S43/242—Light guides characterised by the emission area
- F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
-
- 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
- F21S43/235—Light guides
- F21S43/247—Light guides with a single light source being coupled into the light guide
-
- 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
Definitions
- the present invention claims the priority of French application 2203828 filed on 04.25.2022, the content of which (text, drawings and claims) is here incorporated by reference.
- the invention relates to lighting devices which comprise N light guides associated with N sources of photons, with N > 1, and which must participate in the realization of at least one photometric function.
- photometric function means both a photometric signaling function, a photometric lighting function or a photometric light effect function, possibly decorative.
- lighting devices comprising N light guides which each comprise a first part receiving through an end face photons generated by an associated source and a second part which includes a front face through which photons from this first part exit, with N > 1.
- the N light guides and the N associated sources are generally housed in an internal housing (or cavity) which is defined by a housing and a glass located in front of the second parts of the N light guides.
- the lighting devices can be part of (or constitute) optical units (front or rear) of vehicles responsible for ensuring at least one photometric function.
- the photometric function can, for example, be a signaling function, such as a daytime running light function (or DRL ("Daytime Running Light (or Lamp)" - light signaling automatically switched on when the vehicle is switched on). in operation during the day)), or a function direction change indicator (or flashing), or even a position light function.
- each light guide has a bent (or curvilinear) sub-part
- the end face of the first part and the associated source are located substantially in the axis of this bent sub-part. Consequently, the front face of each angled sub-part of a second part constitutes a “hot spot” which seems, to a person placed in front, notably brighter than the sub-part of the second part which follows this sub-part elbow, even though we wish to obtain relative homogeneity of the illumination on the visible front face of this second part.
- each black zone is intended to mask a technical part and/or at least one part of at least one bent sub-part, in order to prevent the photons released by each bent sub-part cross the ice and therefore create a visible hot spot.
- this has a negative impact on the style and/or perceived quality of the lighting device, because a person placed in front of it observes a large black and opaque area without understanding the reason when it is not in operation.
- the invention therefore aims in particular to improve the situation.
- a lighting device comprising N light guides each comprising a first part receiving through an end face photons generated by an associated source and a second part comprising a front face through which photons exit from this first part, with N > 1.
- This lighting device is characterized by the fact that the first part of each light guide has at least one curvature defining an elbow and forcing the photons penetrating through its end face to join the front face of the second part after at least an internal reflection in this first part.
- the invention it becomes impossible for the photons coming from a source to propagate to the front face of a second part of a light guide either directly without any reflection, or indirectly with at least one reflection according to a very obtuse angle.
- the lighting device according to the invention may include other characteristics which can be taken separately or in combination, and in particular:
- each light guide can have two different curvatures defining two successive bends and forcing the photons penetrating through its end face to join the front face of the second part after at least two internal reflections in this first part;
- the N light guides may comprise a housing in which the N light guides are installed and comprising a rear part comprising a wall provided with N first through holes each located opposite the end face of a first part of a light guide corresponding and having an external face in front of which the source which is associated with this light guide is installed;
- it may include a support part to which the N sources are coupled and installed on the external face of the wall of the rear part of the housing in front of the first N through holes;
- the support part can be installed in a liquid and dust-tight manner on the external face of the wall of the rear part of the housing;
- the support part can provide a heat exchanger function
- each support can comprise a rear part located in front of the wall of the rear part of the housing and comprising a second through hole located opposite a first corresponding through hole and allowing the passage of photons, coming from the end face and exited at an elbow of the first part of the corresponding light guide, towards an area of the housing which is invisible from the outside of the latter.
- the invention also proposes a vehicle, possibly of the automobile type, and comprising at least one lighting device of the type presented above.
- each lighting device can constitute a front or rear optical unit providing at least one photometric lighting or signaling function.
- FIG. 1 schematically illustrates, in a perspective view, part of an exemplary embodiment of a lighting device according to the invention
- FIG. 2 schematically illustrates, in a perspective view, the lighting device of Figure 1 without its support part
- FIG. 3 schematically illustrates, in a perspective view from the front side, a rear part of the lighting device of Figures 1 and 2, and
- FIG. 4 illustrates schematically, in a sectional view in a longitudinal and vertical plane at the level of a light guide, a part of the lighting device of Figure 1.
- the invention aims in particular to propose a lighting device DE having at least one light guide GL comprising a first bent part P1, in particular so as to prevent the creation of a hot spot on an bent sub-part SPC of the second part P2 which extends this first part P1 and has a front face FV through which photons participating in a photometric function exit.
- the lighting device DE is intended to be part of an automobile type vehicle, such as for example a car.
- the DE lighting device can be equipment that can be attached and used in numerous systems or that can be part of other equipment that is itself part of a system.
- the DE lighting device can be part of any vehicle (land, sea (or river), or air), of any installation, including industrial type, of any device ( or system), including the general public type, and any building, for example.
- the lighting device DE constitutes an optical unit of a motor vehicle ensuring at least one photometric function. But this is not obligatory.
- the lighting device DE constitutes a front light. But it could constitute a rear light or a headlight (or headlight) of a vehicle.
- the DE lighting device is intended to provide at least one photometric signaling function.
- this photometric signaling function can be a daytime running light function (or DRL (“Daytime Running Light (or Lamp)”). But it could be act as a position light function (possibly in the side part) or even as a direction change indicator function (or flashing light).
- the invention is not limited to photometric signaling functions.
- the lighting device DE is a light device capable of performing at least one function photometric signaling or lighting or luminous effect (possibly decorative).
- a lighting device DE comprises N light guides GL and N photon sources S associated respectively with these N light guides GL, with N > 1 .
- a lighting device DE according to the invention can comprise any number N of light guides GL and photon sources S, as long as this number N is greater than or equal to one (1).
- Each source S is arranged so as to generate photons when supplied with electric current.
- each source of photons S may include at least one light emitting diode (or LED (“Light Emitting Diode”)) or at least one laser diode or a gas laser or even at least one bulb (possibly xenon).
- the choice of the type of each photon source S may depend on the (each) photometric function in which it participates.
- each source of photons S can be installed on an electronic card CE which can be a printed circuit board of the PCB type (“Printed Circuit Board”).
- Each GL light guide includes a first part P1 and a second part P2 which extend mutually.
- the first part P1 comprises an end face FE which receives the photons which are generated by the associated source S.
- the second part P2 includes a front face FV through which exit photons which come from the first part P1, and which have been reflected one or more times in the latter (P1).
- the first part P1 of each light guide GL has at least one curvature which defines an elbow and forces the photons penetrating through its end face FE to join the front face FV of the second part P2 after at least one internal reflection in this first part P1.
- each first part P1 it becomes impossible for the photons coming from the associated source S to propagate from the end face FE to the front face FV of the second part P2. directly without any reflection, or indirectly with at least one reflection at a very obtuse angle.
- the photons reach the front face FV of the second part P2 with angles of incidence which favor either their reflection towards sub-parts located downstream from where they will emerge in a predefined general direction dg (adapted to the photometric function to be ensured), or their output according to this predefined general direction dg.
- each second part P2 comprises a bent sub-part SPC, as illustrated in Figures 3 and 4, there is no longer any risk of creating a hot spot at this bent sub-part SPC since the photons can no longer propagate appreciably in the axis of the latter (SPC), and therefore the front face FV of each second part P2, visible from the outside, seems to be the subject of homogeneous illumination.
- this particular arrangement advantageously makes it possible to dispense with the local installation of a mask (or cover) against each bent sub-part SPC or the definition (or extension) of black zones intended to mask a at least part of the SPC bent sub-parts.
- first part P1 of each light guide GL can have two different curvatures which define two successive bends and force the photons penetrating through its end face FE to join the front face FV of the second part P2 after at least two internal reflections in this first part P1. This makes it possible to further reduce the probability that a photon exits at a bent sub-part SPC of a second part P2.
- each first part P1 comprises a first bent sub-part comprising the end face FE and extending from top to bottom and from left to right, and a second sub-part bent part extending the first bent sub-part by extending from the bottom upwards to the start of the second part P2.
- the sources S are placed above the end faces FE which are oriented upwards.
- the end faces FE could be oriented downwards and in this case the sources S are placed below the end faces FE, or towards the left and in this case the sources S are placed to the left of the end faces FE.
- end faces FE or even to the right and in this case the sources S are placed to the right of the end faces FE.
- the lighting device DE can comprise a housing BB in which the N light guides GL are installed.
- the N light guides GL are housed in an internal housing Ll which is defined by the housing BB and a glass GD placed in front of the second parts P2 of the N light guides GL and part of the DE lighting device.
- the housing BB is part of the latter.
- the housing BB comprises a rear part PRB comprising a PP wall which is provided with N first through holes T1 each located opposite the end face FE of a first part P1 of a corresponding GL light guide.
- this housing BB has an external face opposite the internal housing Ll and in front of which each source S associated with one of the N light guides GL is installed.
- the N sources S are installed outside the box BB (and therefore the internal housing Ll), which makes them invisible for a person placed in front of the glass GD and avoids having to define a mask in the internal housing Ll to hide them, and therefore makes it possible to reduce the bulk in the latter (Ll).
- this makes it possible to avoid the accumulation in the internal housing Ll of calories generated in operation by the N sources (and the associated electronics).
- the lighting device DE can comprise a support part PS to which the N sources S are coupled.
- This support part PS is installed on the external face of the PP wall of the PRB rear part of the BB box, in front of the first N through holes T1. This installation can be done by clipping and/or screwing, for example.
- the N sources are installed on a CE electronic card, the latter (CE) is fixedly secured to the internal face of the support part PS which is oriented towards the PP wall of the rear part PRB (and therefore towards the first N holes through T1), as illustrated without limitation in Figure 4.
- this PS support part can be installed in a liquid and dust-tight manner on the external face of the PP wall of the PRB rear part of the BB box. This makes it possible to protect the N sources (and the associated electronics on the possible CE electronic card), but also to prevent the entry of liquid and dust into the internal housing Ll, via the first N through holes T1.
- this seal can be obtained by means of small first(s) PE1 and second(s) PE2 peripheral walls (or ribs) closed and defined respectively on the internal face of the support part PS and the external face of the wall PP of the PRB rear part of the BB housing, one surrounding the other, possibly with the interposition of a seal.
- the support part PS can possibly provide a function of heat exchanger (or radiator), in order to evacuate by its external face (opposite to its internal face) the calories generated in operation by the N sources (and the associated electronics on the possible CE electronic card).
- the lighting device DE can comprise N supports SG on each of which is installed a second part P2 of a corresponding light guide GL. This makes it possible to precisely position each light guide GL in the internal housing Ll.
- Each SG support may be a part which is attached to the internal face of the PRB rear part of the BB housing, for example by gluing, clipping or screwing, or may be an integral part of the PRB rear part of the BB housing, particularly when this last (PRB) is made by molding.
- each support SG can, optionally and as illustrated without limitation, comprise a support face on which is placed the rear face FR of the second part P2 of the corresponding light guide GL and having a shape homologous to that of this second part P2. This makes it possible to position the second part P2 of each light guide GL even more precisely in the internal housing Ll, but also to return by reflection inside the second part P2 concerned the photons which exit through its rear face FR.
- each support SG can comprise a rear part located in front of the wall PP of the rear part PRB of the housing BB and comprising a second through hole T2 which is located opposite a first corresponding through hole T1.
- Each second through hole T2 advantageously allows the passage of photons, coming from the end face FE and exiting at an elbow of the first part P1 of the corresponding light guide GL, towards a zone Z of the housing BB which is invisible from outside the latter (BB), in order to trap them.
- N light guides GL are elongated with a circular section. But they could have sections having other geometric shapes (for example elliptical).
- the N light guides GL can be produced in a molding phase with a plastic or synthetic material.
- a plastic or synthetic material for example, polycarbonate (or PC) or poly-methyl methacrylate (or PMMA) can be used.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Planar Illumination Modules (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2203828A FR3134873B1 (fr) | 2022-04-25 | 2022-04-25 | Dispositif d’éclairage à guide(s) de lumière coudé(s) |
| PCT/FR2023/050391 WO2023209303A1 (fr) | 2022-04-25 | 2023-03-20 | Dispositif d'éclairage à guide(s) de lumière coudé(s) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4515141A1 true EP4515141A1 (fr) | 2025-03-05 |
| EP4515141B1 EP4515141B1 (fr) | 2026-04-29 |
Family
ID=82483337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23716644.2A Active EP4515141B1 (fr) | 2022-04-25 | 2023-03-20 | Dispositif d'éclairage à guide(s) de lumière coudé(s) |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4515141B1 (fr) |
| FR (1) | FR3134873B1 (fr) |
| WO (1) | WO2023209303A1 (fr) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2252124A1 (de) | 1972-10-24 | 1974-05-02 | Basf Ag | Disulfide |
| JP2015170387A (ja) * | 2014-03-04 | 2015-09-28 | 市光工業株式会社 | 車両用導光部材、車両用灯具 |
| FR3027856A1 (fr) * | 2014-11-03 | 2016-05-06 | Valeo Vision | Module lumineux pour vehicule automobile comprenant un guide de lumiere |
| EP3311064A1 (fr) * | 2015-06-19 | 2018-04-25 | Valeo North America, Inc. | Système d'éclairage et/ou de signalisation à fibres optiques pour un véhicule |
| JP6762979B2 (ja) * | 2018-03-16 | 2020-09-30 | 株式会社豊田自動織機 | 車両用灯具 |
| FR3083846B1 (fr) * | 2018-07-10 | 2021-06-04 | Psa Automobiles Sa | Module lumineux integre a un projecteur d’un vehicule. |
| IT201800010248A1 (it) * | 2018-11-12 | 2020-05-12 | Automotive Lighting Italia Spa | Dispositivo di illuminazione per veicoli con guide di luce |
| FR3105457B1 (fr) * | 2019-12-20 | 2021-12-24 | Cie Plastic Omnium Se | Boitier de connexion comprenant un coupleur optique surmoulé. |
-
2022
- 2022-04-25 FR FR2203828A patent/FR3134873B1/fr active Active
-
2023
- 2023-03-20 WO PCT/FR2023/050391 patent/WO2023209303A1/fr not_active Ceased
- 2023-03-20 EP EP23716644.2A patent/EP4515141B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023209303A1 (fr) | 2023-11-02 |
| EP4515141B1 (fr) | 2026-04-29 |
| FR3134873A1 (fr) | 2023-10-27 |
| FR3134873B1 (fr) | 2024-09-20 |
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