EP3002502A2 - Leuchtvorrichtung, die mit dispersionsflächen ausgestattet ist, und scheinwerfer, der eine solche leuchtvorrichtung umfasst - Google Patents

Leuchtvorrichtung, die mit dispersionsflächen ausgestattet ist, und scheinwerfer, der eine solche leuchtvorrichtung umfasst Download PDF

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Publication number
EP3002502A2
EP3002502A2 EP15187916.0A EP15187916A EP3002502A2 EP 3002502 A2 EP3002502 A2 EP 3002502A2 EP 15187916 A EP15187916 A EP 15187916A EP 3002502 A2 EP3002502 A2 EP 3002502A2
Authority
EP
European Patent Office
Prior art keywords
transmission surface
transmission
light
light beam
dispersive
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.)
Withdrawn
Application number
EP15187916.0A
Other languages
English (en)
French (fr)
Other versions
EP3002502A3 (de
Inventor
Pierre Albou
Loïc Boinet
Boubacar Sagna
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
Original Assignee
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 EP3002502A2 publication Critical patent/EP3002502A2/de
Publication of EP3002502A3 publication Critical patent/EP3002502A3/de
Withdrawn legal-status Critical Current

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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
    • F21S41/10—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
    • F21S41/16—Laser 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
    • 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
    • F21S43/16—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
    • 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
    • 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
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors

Definitions

  • the present invention relates to a light device provided with dispersive surfaces, especially for a motor vehicle, and a lamp provided with such a light device.
  • Motor vehicle lights are light devices that include one or more light sources and an ice that shuts the fire.
  • the light source emits light rays to form a light beam that is directed towards the ice to produce an illuminating surface that transmits light to the outside of the vehicle.
  • the color of the illuminating surface is characteristic of the function or type of fire.
  • a white illuminated surface indicates that the light is a reverse light, that an amber illuminated surface is a direction indicator, and that a red illuminated surface is a traffic light. rear position or stop lamp, the stop light being brighter.
  • fog lights which are even stronger to be visible in difficult weather conditions, such as fog, heavy rain or snow. In addition to color, these lights must meet intensity and visibility regulations.
  • the rear of a vehicle has a plurality of illuminating surfaces, each illuminating surface having a color specific to each function.
  • the light source has a light intensity chosen with respect to the type of fire.
  • Each of the illuminating surfaces being furthermore produced by at least one different light source, the number of light devices on the vehicle is multiplied.
  • the light sources are, for example, light-emitting diodes.
  • This screen aims to transmit the beam by dispersing the light rays, so that the emission angle around the emission direction of the beam is wider.
  • the direction of emission of such a beam is generally the direction of the optical axis.
  • a light whose color corresponds to the desired fire function is visible in an angularly larger area.
  • the beam is no longer concentrated around its optical axis.
  • diffraction patterns including diffraction tasks that evolve in the field of view of an observer. These tasks are troublesome for the visibility of the fire, the latter can no longer meet the regulations in force. In addition, these tasks are not aesthetic, the fire does not have a uniform illuminated surface.
  • the invention therefore aims to obtain a light device comprising a light beam that scans a screen, which improves the situation and avoids the aforementioned defects.
  • the invention relates to a light device, especially for a motor vehicle, comprising at least one light source capable of emitting light rays to form a light beam.
  • the second transmission surface attenuates the diffraction patterns generated by the first transmission surface.
  • the dispersive patterns of the first transmission surface disperse the light beam from the light source to expand the beam and meet the regulations concerning the function of fire. But they generate on the other hand diffraction tasks, especially for a coherent light.
  • the dispersive patterns of the second transmission surface make it possible to break the diffraction patterns to obtain a light device in accordance with the regulations, and which avoids unwanted aesthetic effects.
  • the device also makes it possible to use particular light sources, such as lasers.
  • Lasers emit in particular coherent light which favors the appearance of diffraction spots on a single transmission surface provided with dispersive patterns.
  • the invention also relates to a motor vehicle light comprising such a light device.
  • the Figures 1 and 2 represent an embodiment of a motor vehicle light, for example a rear light, comprising a light device 1 according to the invention.
  • the light device 1 comprises a light source 2 capable of emitting light rays to form a light beam and a first transmission surface 3 capable of transmitting light. light rays.
  • the first transmission surface 3 is for example arranged on the ice referenced 6 closing the fire.
  • the first transmission surface 3 is the inner face of the glass 6. It may also be a separate element of the lens 6, for example a transmission screen arranged in the fire in front of the lens 6.
  • the beam of light that is produced of the light source 2 is intended to illuminate the first transmission surface 3.
  • the light source 2 is a laser source comprising for example a laser diode, emitting radiation whose wavelength is chosen to obtain the color corresponding to the function of the fire on the ice 6.
  • a wavelength conversion for example a phosphor plate, in the path of the light beam, to transform the wavelength of the laser radiation and thereby obtain the desired color.
  • the light source 2 may also comprise an optical device combining in a single beam several laser rays, for example using optical fibers or devices taking advantage of the different polarizations of different laser sources.
  • the light source 2 is one or more electroluminescent diodes.
  • the device 1 is provided with an optical system 5 configured to collimate the light rays coming from the source 2 in order to form the beam of light.
  • the optical system 5 is for example a single collimation lens, and may also include a reflector.
  • the light beam can project on the transmission surface 3 a trace luminous which has a shape of point, of bigger spot, even an oblong mark.
  • the first transmission surface 3 is a dispersive surface, arranged for example on the glass 6 which closes the fire.
  • the dispersive surface comprises, for example, identical dispersive units distributed over the transmission surface 3.
  • the dispersive patterns are not identical on the first transmission surface. However, the dispersion generated by each pattern must be constant.
  • the device 1 comprises distribution means configured to distribute the light beam on the first transmission surface 3 so that it is illuminated substantially entirely.
  • the distribution means are scanning means 4 configured to ensure the scanning by the light beam of the first transmission surface 3.
  • the scanning is performed at a speed sufficiently high that the human eye does not perceive the light. moving the light trace on the first transmission surface 3, and observes a substantially constant and uniform illumination of the swept portion of the lens 6.
  • the first transmission surface 3 can advantageously be configured to have sufficient dispersion of the beam in case of malfunction of the scanning means 4. Indeed, if the scanning is interrupted, the laser beam is fixed in one direction. It is therefore necessary to ensure the safety of an observer, especially concerning his eyes, at least from a certain distance from the fire.
  • the dispersion is sufficient to ensure this safety after about fifteen centimeters, for example.
  • the light beam coming from the light source 2 is, before striking the transmission surface 3, returned by the scanning means 4 to a first mirror 7 which reflects it to a second mirror 8.
  • the second mirror 8 reflects in turn the light beam towards the transmission surface 3 of the ice 6 of the fire.
  • the two mirrors 7, 8 serve to fold the optical path of the light beam to obtain a compact fire while allowing the light beam to scan the transmission surface 3 with a near normal incidence.
  • the figure 2 represents the luminous device 1 with the path of the light beam from the light source 2 to the mirror 6.
  • the scanning means 4 are for example provided with a movable micro-mirror for scanning the transmission surface 3 by reflection of the light beam in a first direction of the transmission surface 3, which is for example horizontal.
  • the micro-mirror is driven by a periodic movement produced by an actuator (not shown). The movement of the micro-mirror is performed around an axis of rotation orthogonal to the first direction so that the light mark of the light beam sweeps the transmission surface 3 along said first direction.
  • the scanning means 4 are also configured to scan the transmission surface 3 with the light beam in a second direction.
  • the second direction is preferably substantially perpendicular to the first direction to produce a movement of the beam which moves easily on the first transmission surface 3.
  • the micro-mirror is also configured to scan the first transmission surface 3 with the light beam in the second direction.
  • the micro-mirror is the same micro-mirror which sweeps the first transmission surface 3 with the light beam in both directions.
  • the micromirror therefore follows another movement, for example rotation about a second axis of rotation perpendicular to the previous one.
  • the micro-mirror allows the light trace of the light beam to scan both horizontally and vertically the first transmission surface 3.
  • a second embodiment is to use a second micro-mirror to scan the light beam in the second direction.
  • the scanning means are provided with two micromirrors arranged one after the other on the optical path of the beam, each of which has the function of scanning the light beam with the transmission surface 3 according to a from both directions.
  • the micro-mirrors mentioned as scanning means are for example MEMS (for "Micro-Electro-Mechanical Systems” in English or microelectromechanical systems).
  • the invention is not limited to this scanning means and can use other kinds of scanning means such as a series of mirrors arranged on a rotating element, the rotation of the element generating a scanning of the transmission surface by the light beam.
  • the device comprises a second transmission surface 10 arranged to transmit to the outside of the light the light rays coming from the first transmission surface 3.
  • the first surface 3 and the second transmission surface 10 are arranged in the axis of the beam reflected by the second mirror 8.
  • the second transmission surface 10 is also provided with dispersive patterns in order to disperse a second time the light rays coming from the first transmission surface 3.
  • the second transmission surface 10 thus makes it possible to eliminate or at least greatly reduce the diffraction spots produced by the first transmission surface 3.
  • the first 3 and second 10 transmission surfaces are arranged on either side of the lens 6, that is to say on its inner face and its outer face with respect to the fire.
  • the figure 3 shows in particular the glass 6 provided on its faces on each side, first 3 and second 10 transmission surfaces.
  • the first 3 and second 10 transmission surfaces are spaced a distance d substantially equal to the thickness of the ice 6.
  • the dispersive units are preferably uniformly distributed on the transmission surfaces, and each have, for example, a pillow shape 9 having a convex curvature of constant radius of curvature, as shown in FIGS. Figures 3 to 7 .
  • the pads have a concave curvature.
  • the pads 9 are quadrilaterals whose dimensions on each side are between 0.3 and 2mm. Here, the pads are substantially square with curved sides of length 11 between 0.5 and 0.55 mm.
  • the figure 5 shows the exit face of a pad 9 whose curvature causes the deviation of the light rays passing through it. The deflection takes place at an angle ⁇ relative to the axis 13 of the pad 9.
  • the curvature of the pad 9 is chosen as a function of the angle ⁇ that is desired. The more the two transmission surfaces 3 and 10 are close, the greater the angle ⁇ must be for the dispersion to be greater.
  • the first transmission surface 3 and the second transmission surface 10 are spaced a distance d so that the light rays coming from a pad 9 of the first transmission surface 3 preferably cover at least two pads of the second surface. transmission 10 as illustrated on the figure 3 . Indeed, if the scattered radii coming from a pad 9 of the first surface 3 pass through only a pad 9 of the second transmission surface 10, the diffraction spots remain apparent after the second transmission surface 10.
  • the pads 9 of the first transmission surface 3 are preferably larger than the pads 9 of the second transmission surface 10.
  • the large bearing transmission surfaces 9 are easier to manufacture than the transmission surfaces with small bearings 9, which are on the other hand more aesthetic. Thus, since the first transmission surface is hidden, larger pads can be used.
  • said device 1 comprises a transmission screen 16 carrying the first transmission surface 3 arranged in front of the fire exit window 6. Ice 6 is provided with the second transmission surface 10 arranged on the face facing the interior of the fire. On the figure 7 of the third embodiment, the lens 6 is larger than the transmission screen 16 to avoid losing part of the light rays dispersed by the first transmission surface 3.
  • the device comprises a transmission screen 16 provided with the first 3 and second 10 transmission surfaces.
  • the ice 6 does not have dispersive patterns.
  • the dispersive patterns are protected from soiling by the ice 6 because they are inside the fire.
  • this device can advantageously be used to display pictograms, which can in particular be dynamic.
  • the distribution means are then configured to distribute the light beam on the first transmission surface so as to display the pictogram or pictograms on the second transmission surface.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP15187916.0A 2014-10-02 2015-10-01 Leuchtvorrichtung, die mit dispersionsflächen ausgestattet ist, und scheinwerfer, der eine solche leuchtvorrichtung umfasst Withdrawn EP3002502A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1459441A FR3026817A1 (fr) 2014-10-02 2014-10-02 Dispositif lumineux muni de surfaces dispersives, et feu comprenant un tel dispositif lumineux.

Publications (2)

Publication Number Publication Date
EP3002502A2 true EP3002502A2 (de) 2016-04-06
EP3002502A3 EP3002502A3 (de) 2016-08-10

Family

ID=52423836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15187916.0A Withdrawn EP3002502A3 (de) 2014-10-02 2015-10-01 Leuchtvorrichtung, die mit dispersionsflächen ausgestattet ist, und scheinwerfer, der eine solche leuchtvorrichtung umfasst

Country Status (2)

Country Link
EP (1) EP3002502A3 (de)
FR (1) FR3026817A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3343089A1 (de) * 2017-01-02 2018-07-04 odelo GmbH Leuchtmittel und hiermit ausgestattete fahrzeugleuchte

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1591013A (en) * 1978-05-30 1981-06-10 Lucas Industries Ltd High contrast lamp assembly
EP0081361A1 (de) * 1981-12-08 1983-06-15 LUCAS INDUSTRIES public limited company Leuchte
GB8327529D0 (en) * 1983-10-14 1983-11-16 Lucas Ind Plc Indiscernible lamp
US5068768A (en) * 1990-03-28 1991-11-26 Koito Manufacturing Co., Ltd. Variable light distribution type automobile lamp
WO2009112961A1 (en) * 2008-03-10 2009-09-17 Koninklijke Philips Electronics N.V. Laser light source and luminaire
FR3000572B1 (fr) * 2012-12-28 2016-04-29 Valeo Etudes Electroniques Dispositif de transmission d'images pour afficheur et afficheur tete haute equipe dudit dispositif

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3343089A1 (de) * 2017-01-02 2018-07-04 odelo GmbH Leuchtmittel und hiermit ausgestattete fahrzeugleuchte

Also Published As

Publication number Publication date
EP3002502A3 (de) 2016-08-10
FR3026817A1 (fr) 2016-04-08

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