EP3387320A1 - Dispositif d'éclairage à guide de lumière comprenant des trous polygonaux pour réfléchir des photons - Google Patents
Dispositif d'éclairage à guide de lumière comprenant des trous polygonaux pour réfléchir des photonsInfo
- Publication number
- EP3387320A1 EP3387320A1 EP16815606.5A EP16815606A EP3387320A1 EP 3387320 A1 EP3387320 A1 EP 3387320A1 EP 16815606 A EP16815606 A EP 16815606A EP 3387320 A1 EP3387320 A1 EP 3387320A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- photons
- face
- light
- hole
- light guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims description 7
- 230000006870 function Effects 0.000 description 43
- 230000011664 signaling Effects 0.000 description 5
- 238000005286 illumination Methods 0.000 description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 4
- 239000004417 polycarbonate Substances 0.000 description 4
- 239000004926 polymethyl methacrylate Substances 0.000 description 4
- 238000011960 computer-aided design Methods 0.000 description 3
- 230000001795 light effect Effects 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009131 signaling function Effects 0.000 description 1
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
- F21S43/249—Light guides with two or more light sources 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
- F21S43/10—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
- F21S43/20—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
- F21S43/239—Light guides characterised by the shape of the light guide plate-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
- F21S43/243—Light guides characterised by the emission area emitting light from one or more of its extremities
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
- G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
Definitions
- the invention relates to lighting devices, and more specifically those which comprise at least two light sources and a light guide.
- the term "lighting device” is understood here to mean a light device capable of providing at least one photometric function of lighting or signaling or of a luminous effect, possibly decorative.
- lighting devices comprising at least two light sources capable of generating photons, and a light guide capable of transferring photons supplying a photon face, are used. input from a rear area to a front face for transfer to the outside to provide a photometric function.
- the light guide is for example made of polycarbonate (or PC) or polymethyl methacrylate (or PMMA).
- a photometric lighting function may be, for example, a low beam function (or code), a fog lamp function, or a high beam function
- a function photometric signaling may be, for example, a direction change indicator function (or flashing), a stop light function, a reversing light function, a position light function (or night light or lantern) , a daylight running function (or DRL (for "Daytime running Light (or Lamp)" - light signaling automatically when the vehicle is put into operation during the day), or a welcome function (or courtesy) .
- Lighting devices of the type presented above can be realized in at least two different ways.
- the rear zone of the light guide comprises reflecting structures which are associated with each at least one light source, each of which is adapted to reflect the generated photons received by the input face towards the front face.
- the photons thus enter the light guide from above or below the reflective structures.
- These reflective structures are generally joined to each other, they have junction areas that induce on the front face shaded areas that interfere with the homogeneity of the photometric function in which their lighting device participates.
- the entrance face of the light guide is the rear face which is located opposite the front face and opposite which are installed the light sources.
- the photons thus enter the light guide by its back side (or “slice").
- the main disadvantage of this second embodiment lies in the fact that it creates at the level of the front face what the man of the art calls “hot spots", that is to say zones where the light intensity is higher than elsewhere, which affects the homogeneity of the photometric function concerned.
- the invention is therefore particularly intended to improve the situation.
- a lighting device comprising at least two light sources adapted to generate photons, and a light guide adapted to transfer photons, which penetrate through an entrance face in a rear area that it comprises, towards a front face for their transfer to the outside to ensure a photometric function.
- This lighting device is characterized in that its light guide comprises, at predefined locations located between the rear zone and front face and function of the respective positions of the light sources with respect to the input face, at least two holes each having a general polygonal shape defined by walls that are adapted to reflect towards the front face or to a wall of another hole some of the photons being transferred, to ensure with other photons transferred but not reflected by a hole a substantially homogeneous illumination participating in the photometric function.
- the photons can be distributed on the front light of the light guide, which allows the latter to offer a good homogeneity of light on its entire front.
- the lighting device according to the invention may comprise other characteristics that can be taken separately or in combination, and in particular:
- each hole may have a general polygonal shape chosen from (at least) a triangle and a rhombus;
- each hole may have an angle oriented towards the rear zone and shifted transversely with respect to a transverse position of the light source which is the least distant from it;
- each wall of a hole may have dimensions and an orientation relative to the rear zone which are a function of the arrangement of the latter and of a distance separating the front face of a rear face from the rear zone, situated opposite of the front face;
- the rear zone of the light guide may comprise reflecting structures each associated with at least one light source, and each adapted to reflect the photons generated received by the input face towards at least one hole and the front face;
- the entrance face of the light guide may be a rear face located opposite the front face and facing which the light sources are installed;
- its light guide can be flat type
- each light source may be a light diode, for example an LED, a laser diode or an OLED structure.
- the invention also proposes a vehicle optical unit, possibly of automotive type, comprising at least one lighting device of the type of that presented above.
- the invention also proposes a vehicle, possibly of automobile type, and comprising at least one lighting device of the type of the one presented above or at least one optical block of the type of that presented above.
- FIG. 1 schematically illustrates, in a perspective view, a first exemplary embodiment of a lighting device according to the invention
- FIG. 2 schematically illustrates, in a perspective view, a part of the lighting device of FIG. 1,
- FIG. 3 schematically illustrates, in a perspective view, a second exemplary embodiment of a lighting device according to the invention
- FIG. 4 schematically illustrates, in a view from above, a part of the lighting device of FIG. 1, with the materialization of certain photon paths generated by the light sources, and
- FIG. 5 schematically illustrates, in a view from above, an example of a triangular hole that may be part of a lighting device according to the invention.
- the object of the invention is notably to propose a lighting device DE intended to allow a homogeneity of the photometric function in which it participates or which it ensures integrally.
- the lighting device DE is intended to equip an optical block of a vehicle of the automotive type, such as a car.
- a lighting device DE may be an equipment in itself (possibly including its own housing), or may be part of another equipment that a vehicle optical unit.
- a lighting device DE can be part of any vehicle (land, sea (or fluvial), or air), any installation, including industrial type, any device ( or system), and any building.
- the optical unit (comprising at least one lighting device DE) is a rear lamp providing at least one photometric function of signaling, such as a change of direction indicator function (or flashing) or a stop light function or a reversing light function.
- the lighting device DE is a light device that can provide at least a photometric function of lighting or signaling or light effect, possibly decorative.
- a photometric lighting function such as a low beam function (or code), a fog lamp function, or a high beam function.
- a photometric signaling function such as a change of direction indicator function, a stop light function, a reversing light function, a position light function (or pilot light or lantern), a daylight running function (or DRL (for "Daytime running Light (or Lamp)" - automatic illuminated warning when the vehicle is put into operation during the day), or a welcome function (or courtesy), or a photometric function of light effect, possibly decorative.
- FIGS. 1 and 3 show schematically two nonlimiting exemplary embodiments of a lighting device DE according to the invention.
- a lighting device DE comprises at least two light sources SL and a light guide GL.
- Each light source SL is arranged to generate photons.
- each light source SL may be a light diode.
- each light diode may be a light-emitting diode (or LED) or a laser diode or an OLED (Organic Light-Emitting Diode) type structure.
- the SL light sources may, for example, be installed on a support plate.
- This support plate may, for example, be a printed circuit board, PCB type ("Printed Circuit Board”), rigid or flexible ("type” Flex ").
- the light guide GL comprises a rear zone ZR having an input face FS or FR and a front face FV, located opposite its rear zone ZR. It is able to transfer photons, generated by the light sources SL and which enter its rear zone ZR by the input face FR or FS, towards its front face FV, with a view to their transfer to the outside to ensure a photometric function.
- the input face of the rear zone ZR is the upper face FS.
- the rear zone ZR comprises reflecting structures SR which are each associated with at least one light source SL, and which are each adapted to reflect the generated photons received by the input face FS (here the upper face) towards the FV front panel.
- the photons thus enter the light guide GL from above the reflective structures SR.
- the input face of the rear zone ZR could be the lower face which is opposite to the upper face FS.
- the photons penetrate into the light guide GL from below the reflecting structures SR.
- the input face of the rear zone ZR is the rear face FR which is situated opposite the front face FV.
- the light sources SL are installed opposite the rear face FR, and therefore the photons penetrate into the light guide GL by its rear face FR (or "slice").
- the light guide GL is of flat type (in English "flat guide”). It is therefore intended to provide "direct” lighting. But it could have at least one curvature (and in this case the SL light sources are preferentially installed on a flexible printed circuit board (or "Flex”)).
- the light guide GL may be made of polycarbonate (or PC) or polymethyl methacrylate (or PMMA).
- the light guide GL comprises at least two holes TR in predefined places which are located between its rear zone ZR and its front face FV and which are a function of the respective positions of the light sources SL with respect to its input face FR or FS.
- Each TR hole has a general polygonal shape which is defined by PT walls suitable to reflect towards the front face FV or to a wall PT of another hole TR some of the photons that are being transferred, to ensure with other photons, transferred but not reflected by a hole TR, a substantially homogeneous illumination participating in the photometric function of the lighting device DE.
- FIG. 4 schematically shows a few paths of the photons generated by the light sources SL inside the light guide GL. As can be seen, some photons are transferred directly from the rear zone ZR to the front face FV (without being reflected by a hole TR), other photons are transferred indirectly from the rear zone ZR to the front face FV after having have been reflected either by a wall PT of a hole TR, or by two walls PT of two neighboring holes TR.
- the objective of the reflections on the walls PT holes TR is to allow a transfer of photons on areas of the front face FV that would be unreachable in the absence of holes TR (and therefore where would occur shadows ), while avoiding the formation of hot spots, so as to offer a homogeneity of the photometric function of the lighting device DE.
- the TR holes therefore act as "distributors" of photons.
- each wall PT of a hole TR can advantageously have dimensions and an orientation relative to the rear zone ZR which are a function of the arrangement of the latter (ZR) and the distance that separates the front face FV of the rear face FR.
- ZR the arrangement of the latter
- SR the distance that separates the front face FV of the rear face FR.
- the shapes and dimensions of the holes TR and the positions of the latter (TR) within the light guide GL can therefore be determined by the calculation, thanks to the laws of linear optics. It will be understood that the calculation makes it possible to optimize the distribution of the photons on the front face FV, and therefore the homogeneity of the illumination participating in the photometric function of the lighting device DE.
- each hole TR has a general polygonal shape of triangle type.
- the general polygonal shape could be a rhombus, for example.
- a triangular TR hole intended to form part of a light guide GL of the type illustrated in FIGS. 1, 2 and 4 and having its zone rear ZR separated from its front face FV of about 55 mm may have a first angle A1 of 22 °, a second angle A2 of 27 °, a third angle A3 of 131 °, and be defined by a first wall PTi 15 mm long, a second wall PT 2 8 mm long and a third wall PT 3 10 mm long.
- the holes TR may be non-through. But alternatively they could be through.
- the depth (or height) of each hole TR may be about 4 mm.
- each hole TR may have a first angle A1 which is oriented towards the rear zone ZR and which is shifted transversely with respect to the transverse position of the light source SL who is the least distant from him (A1).
- the positions of the TR holes depend on the shape of the SR reflective structures.
- the front face FV of the light guide GL may optionally comprise three-dimensional (or 3D) patterns capable of transferring the photons outwards according to preferred directions. chosen, adapted to the photometric function. As illustrated, these patterns For example, three-dimensional structures may be stepped with transverse recesses.
- the hot spots and the shadows are avoided on the front face of illumination of the light guide, which allows the latter to offer a (very) good homogeneity lighting on its entire front.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1561955A FR3044744B1 (fr) | 2015-12-08 | 2015-12-08 | Dispositif d’eclairage a guide de lumiere comprenant des trous polygonaux pour reflechir des photons |
PCT/FR2016/053111 WO2017098107A1 (fr) | 2015-12-08 | 2016-11-28 | Dispositif d'éclairage à guide de lumière comprenant des trous polygonaux pour réfléchir des photons |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3387320A1 true EP3387320A1 (fr) | 2018-10-17 |
Family
ID=55646715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16815606.5A Pending EP3387320A1 (fr) | 2015-12-08 | 2016-11-28 | Dispositif d'éclairage à guide de lumière comprenant des trous polygonaux pour réfléchir des photons |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3387320A1 (fr) |
CN (1) | CN108368982A (fr) |
FR (1) | FR3044744B1 (fr) |
WO (1) | WO2017098107A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109506205B (zh) * | 2017-09-14 | 2022-08-05 | 法雷奥照明湖北技术中心有限公司 | 光束调整装置、车灯与机动车辆 |
JP7046640B2 (ja) | 2018-02-21 | 2022-04-04 | スタンレー電気株式会社 | 車両用灯具 |
FR3086368B1 (fr) * | 2018-09-25 | 2021-04-16 | Psa Automobiles Sa | Dispositif d’eclairage a guide de lumiere a longueur d’eclairage variable en fonction des besoins |
KR20210004143A (ko) * | 2019-07-03 | 2021-01-13 | 엘지이노텍 주식회사 | 조명 모듈, 조명 장치 및 램프 |
DE102019128663A1 (de) * | 2019-10-23 | 2021-04-29 | Automotive Lighting Reutlingen Gmbh | Signalleuchte mit einem Lichtleiter |
TW202326256A (zh) * | 2021-12-28 | 2023-07-01 | 華碩電腦股份有限公司 | 背光模組 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11284803A (ja) * | 1998-03-27 | 1999-10-15 | Citizen Electronics Co Ltd | 線状光源ユニット |
FR2900220B1 (fr) * | 2006-04-24 | 2008-07-18 | Valeo Vision Sa | Dispositif d'eclairage ou de signalisation avec effet de profondeur. |
CN101078795B (zh) * | 2006-05-24 | 2010-05-12 | 清华大学 | 导光板及背光模组 |
US9091411B2 (en) * | 2012-11-02 | 2015-07-28 | Osram Sylvania Inc. | Illumination techniques and devices |
FR3002895B1 (fr) * | 2013-03-05 | 2016-12-23 | Peugeot Citroen Automobiles Sa | Dispositif d'indication de changement de direction d'un vehicule, a guide de lumiere et ecran opalin |
FR3015005B1 (fr) * | 2013-12-13 | 2018-12-07 | Valeo Systemes Thermiques | Dispositif lumineux |
-
2015
- 2015-12-08 FR FR1561955A patent/FR3044744B1/fr active Active
-
2016
- 2016-11-28 WO PCT/FR2016/053111 patent/WO2017098107A1/fr active Application Filing
- 2016-11-28 CN CN201680072048.0A patent/CN108368982A/zh active Pending
- 2016-11-28 EP EP16815606.5A patent/EP3387320A1/fr active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2017098107A1 (fr) | 2017-06-15 |
FR3044744B1 (fr) | 2022-02-25 |
CN108368982A (zh) | 2018-08-03 |
FR3044744A1 (fr) | 2017-06-09 |
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Owner name: STELLANTIS AUTO SAS |