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EP4113001B1 - Module d'éclairage pour dispositif d'éclairage d'un véhicule et procédé de réduction d'une désaturation de la couleur dans un module d'éclairage pour un dispositif d'éclairage d'un véhicule - Google Patents

Module d'éclairage pour dispositif d'éclairage d'un véhicule et procédé de réduction d'une désaturation de la couleur dans un module d'éclairage pour un dispositif d'éclairage d'un véhicule Download PDF

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Publication number
EP4113001B1
EP4113001B1 EP21183052.6A EP21183052A EP4113001B1 EP 4113001 B1 EP4113001 B1 EP 4113001B1 EP 21183052 A EP21183052 A EP 21183052A EP 4113001 B1 EP4113001 B1 EP 4113001B1
Authority
EP
European Patent Office
Prior art keywords
rear wall
light
guide body
wall region
radiation
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
EP21183052.6A
Other languages
German (de)
English (en)
Other versions
EP4113001A1 (fr
Inventor
Bernhard Kreipe
Christian Studeny
Helge Holtorf
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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 Volkswagen AG filed Critical Volkswagen AG
Priority to EP21183052.6A priority Critical patent/EP4113001B1/fr
Priority to CN202210778846.2A priority patent/CN115560263A/zh
Priority to US17/856,350 priority patent/US11988355B2/en
Publication of EP4113001A1 publication Critical patent/EP4113001A1/fr
Priority to US18/656,912 priority patent/US12516790B2/en
Application granted granted Critical
Publication of EP4113001B1 publication Critical patent/EP4113001B1/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
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F21S2/005—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction of modular construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings
    • 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
    • F21S43/237—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
    • F21S43/236—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
    • F21S43/245—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
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/31—Optical layout 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
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/33—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors characterised by their material, surface treatment or coatings
    • 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
    • F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
    • 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
    • F21S43/50—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • 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
    • 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
    • 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
    • F21W2107/20—Use or application of lighting devices on or in particular types of vehicles for water vehicles
    • 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
    • F21W2107/30—Use or application of lighting devices on or in particular types of vehicles for aircraft
    • 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]

Definitions

  • Light module for a lighting device of a vehicle and method for reducing color desaturation in a light module for a lighting device of a vehicle relate to a light module for a lighting device of a vehicle with at least one light source and a light guide body, which is suitable and intended to guide radiation emanating from the light source and coupled into the light guide body to a light exit surface of the light guide body.
  • the present invention further relates to a lighting device and a method for reducing color desaturation in a light module, preferably for a lighting device in particular of a vehicle.
  • Lighting devices for vehicles have been known from the state of the art for some time.
  • a lighting device in a vehicle usually fulfills at least one lighting function.
  • the lighting function can be selected from a group of lighting functions which includes an illumination function (for example of a roadway area), a repeat flashing light function, for example for indicating the direction of travel, a brake light function to indicate braking activity, a side light function, such as a rear light function, to ensure the visibility of the vehicle during the day and/or at night, and the like, as well as combinations thereof.
  • an illumination function for example of a roadway area
  • a repeat flashing light function for example for indicating the direction of travel
  • a brake light function to indicate braking activity
  • a side light function such as a rear light function
  • the applicant's internal prior art discloses a lighting module for a motor vehicle with a flat light body and a light source, the light rays of which can be coupled into the light body and exit the light body to the outside via a light exit surface. Furthermore, a rear surface opposite the light exit surface is covered with a reflective or diffusely backscattering cover which is formed by a frame-like component.
  • a vehicle lighting system comprising: a light guide member having a front side as a light emitting surface, a rear side having a plurality of reflective portions inclined toward the front side, and a side surface; and a light source disposed opposite the side surface.
  • An angle theta defined between the front surface and the side surface is designed such that, of external light entering the light guide member, a light directly reaching the side surface can be completely reflected at a boundary surface of the side surface.
  • a lamp for a motor vehicle comprising: a flat light guide that has a front side, a back side and end faces, wherein coupling-out structures for light are provided on the front side; and at least one light source for coupling light into the flat light guide.
  • the lamp includes a graphic on the back of the light guide that is made up of areas with different degrees of reflection and/or colors, wherein the coupling-out structures and the graphic have the same graphic pattern and are aligned with one another and the at least one light source couples the light into the flat light guide on one end face.
  • a lighting unit for a vehicle marker lamp which is constructed in such a way that the light from a plurality of light-emitting diodes impinges on a light guide element and the light is emitted towards the front of the lighting device at a plurality of locations on the light guide element, wherein in the case that the light guide element is composed of a plurality of columnar light guide parts, the area ratio of a light emitting part is sufficiently increased after a sufficiently safe amount of light is incident on the respective columnar light guide parts.
  • an illumination device capable of implementing optical images having desired shapes through a pattern design, the illumination device comprising: a light source portion having light sources; a light guide portion having a thickness greater than a height of a light-emitting surface of the respective light sources and radiating an incident beam from one side; a three-dimensional shaping portion provided inside the light guide portion on a first surface or on a second surface, and a reflecting portion on the light guide portion or the three-dimensional effect forming portion, the three-dimensional effect forming portion including a plurality of patterns arranged sequentially and having respective inclined surfaces having inclination angles with respect to the first surface, the plurality of patterns guiding light passing along the light guide portion in a first surface direction or a second surface direction, thereby realizing line-shaped beams of a first path.
  • a lighting unit which has three light guides which have front sides for coupling in light from light sources and a light exit surface for coupling out the coupled light. Another front side of the light guide serves as a light exit surface. The front sides are assigned to the respective side parts of the light guides.
  • One broad side of the light guide is partially provided with a surface texture, notch, plating, coating, varnish and cover.
  • the present invention is based on the object of overcoming the disadvantages known from the prior art and of providing a light module, a lighting device and a method for reducing color desaturation in a light module, preferably for a lighting device, in particular of a vehicle, which offer a reduction in color desaturation and thus an improvement in the lighting function, in particular even during the day.
  • the light guide is suitable and intended to guide radiation emanating from the illuminant and coupled into the light guide body to a light exit surface of the light guide body (in particular to exit from the light guide body).
  • the light module has at least one rear wall device, which is preferably arranged at least in part in the beam path of ambient radiation entering the light guide body from the outside through the light exit surface of the light guide body.
  • the light exit surface is preferably a substantially flat (side) surface of the light guide body.
  • the rear wall device (in particular on the side facing the light body) has at least one first rear wall region and at least one second rear wall region, wherein the at least one first rear wall region and the at least one second rear wall region differ from one another with regard to a reflection and/or absorption property, in particular with regard to the ambient radiation (or ambient radiation which enters the light guide body from the outside through the light exit surface).
  • a rear wall device which, in particular on its side facing the light guide body, has at least two rear wall regions which differ from one another with regard to their reflection and/or absorption properties, in particular with regard to the ambient radiation incident on the light guide body and striking the rear wall device.
  • no further (optical) element is arranged between the rear wall device and the light guide body.
  • the rear wall device is arranged opposite the light guide body in such a way that (ambient) radiation emerging from the rear side of the light guide body in the direction of the rear wall device strikes the rear wall device directly, i.e. without first being scattered and/or reflected by a further optical element.
  • the advantage of a rear wall region with high reflection and/or low absorption can be combined with the advantage of a rear wall region with low reflection and/or high absorption, which can advantageously ensure reduced color desaturation, by means of the at least one first and second rear wall region, each of which differs in its reflection and/or absorption properties.
  • the at least one first and second rear wall region proposed according to the invention can achieve a reduction in the color desaturation of externally illuminated optical surfaces while at the same time fulfilling the desired lighting function in the best possible way.
  • the at least one first and/or the at least one second rear wall region is arranged in the beam path of an ambient radiation incident from the outside through the light exit side of the light guide body into the light guide body.
  • the at least one first rear wall region is designed in such a way and preferably the absorption and/or reflection property is selected in such a way that, in particular through absorption and/or (diffuse) scattering or reflection of the radiation impinging on the first rear wall region, the spectrum of the radiation emerging from the light exit surface is caused to essentially correspond to the spectrum of the radiation emerging from the light exit surface and coupled into the light guide body by the at least one illuminant and/or to deviate only slightly from it.
  • a deviation that is only slight can be understood in particular to mean that for a user of the light function (essentially) no difference is visually perceptible or that this is within a (preferably predetermined) tolerance range.
  • the at least one first rear wall region is adapted to a light function to be fulfilled by the light module (for example, output of light of a predetermined spectrum) in such a way that it is suitable and intended to absorb (and/or reflect) radiation striking the at least one first rear wall region in a wavelength-selective manner depending on the predetermined or output spectrum.
  • the light module for example, output of light of a predetermined spectrum
  • the first rear wall area can have a colored or reflective (surface) area.
  • the color of the rear wall area can preferably be be adapted to the spectrum to be emitted by the light module and/or the light function to be fulfilled by the light module.
  • the first rear wall region has the color of the radiation to be emitted by the light module.
  • the at least one second rear wall region is designed in such a way and the absorption and/or reflection property is preferably selected in such a way that a (particularly as good as possible) homogeneity and/or (as large as possible) light yield and/or (as high as possible) intensity of the radiation emerging from the light exit surface is achieved, in particular by reflecting the radiation impinging on the second rear wall region.
  • the at least one second rear wall region can have a light, in particular white, and/or (comparatively) rough surface.
  • a rough surface is preferably understood to mean a non-reflective surface on which radiation incident on the surface in particular is diffusely reflected.
  • reflection property is to be understood in particular as a value which is characteristic of a reflection and/or backscattering of incident radiation, for example a degree of reflection.
  • reflection includes not only directed (specular) reflection but also diffuse reflection or radiation scattered on the surface (in particular non-directed or diffuse).
  • the reflection property preferably relates to at least a section of the at least first or second rear wall region and particularly preferably to the entire at least first or second rear wall region.
  • absorption property is to be understood in particular as a value which is characteristic of an absorption of incident radiation, for example an absorption coefficient.
  • the absorption property preferably relates to at least a section of the at least first or second rear wall region and particularly preferably to the entire at least first or second rear wall region.
  • the absorption property and/or reflection property can relate to the light exit surface (and/or in particular in relation to a fictitious plane formed by the light exit surface and/or a fictitious plane parallel to the light exit surface) and thereby ambient radiation incident from outside (and striking the respective at least first or second rear wall region).
  • the absorption property (and analogously the reflection property) can be a value that is characteristic of an absorption (and analogously the reflection) of (ambient) radiation incident through the light exit surface from the outside into the light guide body, which impinges on the respective (at least first or second) rear wall region, through the respective (at least first or second) rear wall region.
  • the at least first rear wall region (at least in some regions and preferably substantially across the entire rear wall region) can have an absorption level and/or reflection level that differs from the absorption level and/or reflection level of the at least second rear wall region.
  • the at least first rear wall region has a substantially homogeneous and/or identical reflection level and/or absorption level at least in some sections and preferably across their respective entire region.
  • the at least second rear wall region has a substantially homogeneous and/or identical reflection level and/or absorption level at least in some sections and preferably across their respective entire region.
  • the at least first rear wall region and the at least second rear wall region each have (substantially) a homogeneous design and/or structure and/or surface quality and/or (surface) structure and/or color across their respective (surface) regions.
  • the light body is a flat light body.
  • a flat light body is understood to mean in particular a light body whose (geometric) extension in two of three spatial directions is significantly larger (preferably by at least a factor of 3, preferably by at least a factor of 4, preferably by at least a factor and particularly preferably by at least a factor of 5) than in the third spatial direction.
  • the light module is preferably designed in such a way and/or the illuminant is arranged in such a way in relation to the light guide body that radiation emanating from the illuminant can be coupled in or is coupled in via a side surface (the light entry side) of the light guide body and the radiation coupled into the light guide body is guided to a light exit side of the light guide body and in particular to the light exit surface (through the light guide body).
  • the light exit side of the light guide body preferably has the light exit surface or Particularly preferably, the light exit side of the light guide body forms the light exit surface (designed as a radiation surface).
  • the light module and in particular the light guide body preferably have a (in particular optical) decoupling device, by means of which the radiation emitted by the light source, coupled in at the light entry side (which is in particular a side surface of the light guide body), in particular laterally, is decoupled from the light guide body, in particular (at least a primary radiation) via the light exit surface.
  • the decoupling device preferably has a plurality of optical decoupling elements for scattering and/or reflecting the light module emitted by the light source in the direction of the light exit surface.
  • the plurality of optical decoupling elements can have a sawtooth-like and/or sawtooth-shaped profile in cross section.
  • the decoupling device can be formed by a surface profile of the light guide body.
  • the light guide body is preferably essentially cuboid-shaped (in which case a surface structure and/or surface profiling present to form a decoupling device is not taken into account).
  • the light exit surface and/or the light exit side is surrounded by side surfaces of the light body or (immediately) adjacent to the side surfaces of the light guide body.
  • the rear wall device is arranged behind the rear side and in particular behind the rear side, as viewed from the light exit surface in the direction of a rear side of the light guide body opposite the light exit surface and in particular in the direction of a rear surface opposite the light exit surface.
  • the rear wall device covers the rear side (which is in particular the side opposite the light exit side and/or the light exit surface of the light guide body) of the light guide body at least in regions and preferably completely.
  • the rear wall device extends (in particular in a plane parallel to the plane of extension of the rear side and/or the light exit surface of the light guide body) over the extent of the light guide body (in a sectional plane through the light guide body along the light exit surface and/or the rear side or the rear surface of the light guide body).
  • the rear wall device adjoins at least partially to the light guide body and in particular to the rear side (in particular the rear surface) of the light guide body.
  • both the at least first rear wall region and the at least second rear wall region are arranged on the same element of the rear wall device.
  • the rear wall device has several elements, wherein it is conceivable that the at least one first rear wall region is arranged on one element and the at least one second rear wall region is arranged on a different element of the rear wall device.
  • the rear wall device is designed as a one-piece element.
  • the light body is preferably designed as a light guide, preferably as a surface light guide, and preferably has a transmittance (light permeability) in a range from about 85 percent to about 95 percent, preferably in a range from about 90 to 95 percent.
  • the transmittance is particularly preferably about 92 percent.
  • a material of the at least first rear wall region differs from a material of the at least second rear wall region in an absorption property and/or reflection property (preferably at least in some regions and particularly preferably across the entire at least first and/or second rear wall region).
  • the material of the first rear wall region preferably has a different scattering property from the material of the at least second rear wall region.
  • the (at least partially) different material of the at least one first rear wall region in relation to the at least one second rear wall region contributes to the different reflection and/or absorption property of the at least first rear wall region compared to the at least second rear wall region and particularly preferably this is (also or exclusively) brought about by this.
  • a surface quality of the at least first rear wall region differs from a surface quality of the at least second rear wall region (preferably at least in some regions and particularly preferably across the entire at least first and/or second rear wall region). This also advantageously makes it possible to achieve a different effect of the rear wall regions with regard to color desaturation when externally illuminated and/or homogeneity and/or intensity of the emitted radiation.
  • the (at least regionally) different surface quality of the at least one first rear wall region in relation to the at least one second rear wall region contributes to the different reflection and/or absorption property of the at least first rear wall region compared to the at least second rear wall region and particularly preferably this is (also or exclusively) brought about by this.
  • the at least one first rear wall region differs from the at least one second rear wall region at least in regions and preferably over the entire first rear wall region by a surface geometry, whereby preferably (also and preferably exclusively) this results in a different reflection and/or absorption property (of the at least one first rear wall region from the at least one second rear wall region).
  • This can also advantageously achieve a different effect of the rear wall regions with regard to color desaturation when externally illuminated and/or homogeneity and/or intensity of the emitted radiation.
  • the at least one first rear wall region (and/or the at least one second rear wall region) may have a surface geometry which is a surface geometry deviating from a flat surface
  • this first rear wall region can have at least one depression and/or at least one curved surface wall and/or at least one recess and/or at least one projection.
  • the surface geometry deviating from a flat surface is suitable and intended to receive or absorb radiation falling on the surface geometry (in particular radiation coming from the direction of the light guide body and in particular (ambient) radiation radiated through the light exit surface of the light guide body) and/or (due to the geometry) to reflect and/or throw back from a surface wall and/or scatter it before it leaves the respective rear wall area more than once, preferably more than twice, preferably more than three times, preferably more than four times and particularly preferably more than five times.
  • the at least one second rear wall region is designed to be (substantially) flat or as a flat surface, at least in sections and preferably over the entire second rear wall region.
  • the at least one first rear wall region is also designed to be (substantially) flat or as a flat surface, at least in sections and preferably over the entire first rear wall region.
  • the at least one first rear wall region and the at least second rear wall region are designed to be (essentially) flat or as a flat surface at least in sections and preferably over the entire first rear wall region.
  • the at least first rear wall region and the at least second rear wall region differ in their material properties and/or in their surface properties, so that in particular this results in different reflection and/or absorption properties from one another.
  • the at least one first rear wall region has a surface geometry that deviates from a flat surface and that the at least one second rear wall region is flat or designed as a flat surface.
  • the at least one first rear wall region (particularly in this case) has an identical material composition in relation to the at least one second rear wall region. It is also possible that (particularly here) the surface device with the at least first rear wall region and the at least second rear wall region is made of the same workpiece and/or in a common (single) process step.
  • first and/or second rear wall regions designed as flat surfaces are arranged (substantially) parallel to the light exit surface of the light guide body and/or to the rear side or rear surface of the light guide body.
  • the at least one first and/or the at least one second (in particular all) rear wall region(s) are aligned with respect to the light guide body and in particular with respect to the light exit surface and/or the rear side or the rear surface, wherein the alignment preferably brings about a (substantial) optimization of an intended absorption and/or reflection of (ambient) radiation penetrating (in particular at a predetermined angle) through the light exit surface into the light guide body by the respective rear wall regions.
  • the side of the rear wall device facing the light guide body and/or the facing surface of the rear wall device which in particular has the at least one first and/or the at least one second rear wall region, extends substantially along a main extension plane.
  • the rear wall device is aligned with respect to the light guide body in such a way that the main extension plane is arranged substantially parallel to the light exit surface and/or to the rear side and/or to the rear surface of the light guide body.
  • a main extension direction of a section of the first rear wall region (and preferably also a main extension direction of a further section of the first rear wall region that is different from the first-mentioned section and/or opposite the first-mentioned section) encloses an angle other than zero with the main extension plane of the side of the rear wall device facing the light guide body and/or with a main extension direction of the second rear wall region and/or with a main extension direction of the light exit surface and/or the rear side of the light guide body and preferably an angle in a range between 20° and 80°, preferably between 30° and 70°, preferably between 40° and 60°, preferably between 40° and 50° and particularly preferably an angle of (substantially) 45°.
  • This section is preferably an area that (immediately) adjoins and/or borders a second rear wall region.
  • the two sections of the first rear wall region are parallel to one another and/or have a surface profile that is parallel to one another.
  • the first section and particularly preferably the two sections extend into the rear wall device (in particular with respect to the main extension plane of the surface of the rear wall device facing the light guide body).
  • a main extension direction of the at least one first rear wall region runs obliquely to the main extension plane and in particular forms an angle between 30° and 70°, preferably between 40° and 60°, preferably between 40° and 50° and particularly preferably of substantially 45° (between the main extension direction of the at least one first rear wall region and the main extension plane).
  • a bottom region of the first rear wall region is arranged closer to the lighting means than an opening region of the first rear wall region, in which radiation enters the first rear wall region and which is preferably arranged in front of the bottom region of the first rear wall region in the direction of incidence of radiation incident into the first rear wall region.
  • the direction of incidence of the primary radiation emitted by the illuminant forms an acute angle (preferably an angle between 40° and 60°, preferably between 40° and 50° and particularly preferably of substantially 45°) with a first side wall section (facing the illuminant) of the first rear wall region, which, viewed in this direction of incidence, is arranged after a second side wall section (facing away from the illuminant) of the first rear wall region.
  • the at least one first rear wall region delimits (in particular at least in sections and preferably completely) a cavity, in particular for receiving ambient radiation entering the light guide body from the outside through the light exit surface of the light guide body.
  • the cavity is preferably a cavity that is only open on one side (preferably the side facing the light guide body). In other words, the cavity preferably has only one opening through which radiation can penetrate into the cavity.
  • the formation and/or delimitation of a cavity offers the advantage that ambient radiation entering the cavity is preferably reflected and/or scattered several times on a cavity wall before the ambient radiation leaves the cavity.
  • the cavity is limited (in particular only) in a direction perpendicular to the main extension plane of the rear wall device (in particular the side facing the light guide body) and/or in a direction perpendicular to the light exit surface of the light guide body.
  • the cavity can be elongated and/or groove-like and/or groove-shaped and/or wave-shaped and can be open to at least one end (in particular to both side ends) of the elongated and/or groove-like and/or groove-shaped and/or wave-shaped structure.
  • elongated is to be understood as meaning that the cavity follows a path whose length is many times (in particular twice, preferably four times, preferably 10 times, preferably 20 times) greater than one (in particular every) extension of the cavity in a direction perpendicular thereto.
  • the cavity (and in particular a central axis of the cavity) extends in a (main extension) direction which forms an angle other than zero with the main extension plane of the side and/or surface of the rear wall device facing the light body and preferably an angle in a range between 20° and 80°, preferably between 30° and 70°, preferably between 40° and 60°, preferably between 40° and 50° and particularly preferably an angle of (substantially) 45°.
  • side walls of the cavity extend (substantially) parallel to the central axis and/or to the main extension direction of the cavity.
  • An angle of 45° is particularly advantageous because radiation incident perpendicular to the main extension plane of the (side of the) rear wall device (facing the light body) is scattered and/or reflected by a side wall of the cavity (formed by the first rear wall region) parallel to the main extension device and (subsequently) is scattered and/or reflected by a further side wall of the cavity further in the direction away from the main extension plane and/or the light body into the interior of the cavity.
  • the at least one first rear wall region has a light trap and/or forms a light trap.
  • the cavity is preferably designed as a light trap.
  • the light trap can have a feed section which guides the radiation to be received and/or absorbed by the light trap into the cavity.
  • the inner surface of the cavity is preferably designed to be absorbent and/or scattering.
  • the surface of the feed section is preferably reflective, but can also be designed to be absorbent and/or scattering.
  • a light trap is preferably a radiation receiving area which is particularly suitable and intended to receive radiation without directed backscattering (from the radiation receiving area).
  • a light trap is preferably understood to be a substantially backscatter-free radiation receiving area for attenuating and/or absorbing unwanted (ambient) radiation and/or a radiation receiving area which is designed and intended to reflect and/or scatter radiation entering the radiation receiving area at least three times, preferably at least five times and particularly preferably at least eight times before it exits the radiation receiving area.
  • the at least second rear wall region has an absorbent coating at least in some areas (and preferably over the entire rear wall region). This offers the advantage that ambient radiation (in particular undesirable) striking the at least second rear wall region is absorbed by the absorbent coating (at least partially and preferably according to an absorption level of the absorbent coating).
  • the absorbent coating preferably comprises nano- and/or microparticles which are suitable and intended for absorbing (undesirable, in particular, radiation visible to humans) radiation.
  • the absorbent coating can comprise carbon nanotubes (also known as CNTs) for absorbing radiation.
  • the at least second rear wall region comprises nanomaterials, in particular with an aligned structure, for absorbing incident ambient radiation.
  • the rear wall device has a plurality of, in particular similar and preferably identical, first rear wall regions and/or a plurality of, in particular similar and preferably identical, second rear wall regions.
  • first rear wall regions and/or second rear wall regions offer the advantage that a more homogeneous radiation can be achieved.
  • each first rear wall region from the plurality of first rear wall regions is designed according to an embodiment described (in particular above) in the context of the at least one first rear wall region.
  • each first rear wall region from the plurality of first rear wall regions is designed according to the same embodiment described (in particular above) in the context of the at least one first rear wall region.
  • the (existing) rear wall can preferably be structured to minimize color desaturation.
  • the proposed light module is a scalable approach that can be scaled in relation to the area of the rear wall.
  • the proposed light module offers volume production at low production costs.
  • each second rear wall region from the plurality of second rear wall regions is designed according to an embodiment described (in particular above) in the context of the at least one second rear wall region.
  • each second rear wall region from the plurality of second rear wall regions is designed according to the same embodiment described (in particular above) in the context of the at least one second rear wall region.
  • the plurality of, particularly preferably all, first rear wall regions and/or the plurality of second rear wall regions, particularly preferably all, have the same extension and/or the same area with respect to the main extension plane and/or a cross-sectional plane.
  • the plurality of, in particular similar, first rear wall regions and/or the plurality of, in particular similar, second rear wall regions are arranged periodically. This offers the advantage of regular light emission by the light module.
  • a plurality of first rear wall regions and a plurality of second rear wall regions are arranged in alternating order. This advantageously results in homogeneous light emission by the light module.
  • a first rear wall region is exclusively (immediately) adjacent to and/or surrounded by second rear wall regions.
  • a second rear wall region it is also possible for a second rear wall region to be exclusively (immediately) adjacent to and/or surrounded by first rear wall regions.
  • the plurality of, in particular similar, first rear wall regions and/or the plurality of, in particular similar, second rear wall regions are arranged in strip form and/or in a grid form and/or in a lattice form and/or in a checkerboard manner. It is also conceivable that a plurality of first rear wall regions (each) are arranged row by row (or along a diagonal) and/or a plurality of second rear wall regions (each) are arranged row by row (or along a diagonal).
  • the areas of different absorption and/or reflection are designed as a pattern or geometric shape in order to achieve an appealing design impression or a design impression that supports a better perception of the outlines and/or light function.
  • the at least one first rear wall region and preferably the plurality of, in particular similar and/or identical, first rear wall regions and/or the at least one second rear wall region and preferably the plurality of, in particular similar and/or identical, second rear wall regions form a (in particular geometric) structure of the rear wall device, preferably with a predetermined structure size.
  • the structure size can preferably be predetermined and given by a geometric extension of the first rear wall region and/or the second rear wall region (and correspondingly by an arrangement by an integer multiple of these respective geometric extensions).
  • the structure size can preferably be influenced by selecting the size of a first and/or second rear wall region and/or by arranging identical or similar (first or second) rear wall regions next to one another.
  • the side and/or surface of the rear wall device (facing the light guide body) is formed (at least in regions and preferably substantially in its entirety) from (exclusively) at least one first rear wall region and/or at least one second rear wall region and preferably from a plurality of first rear wall regions and/or a plurality of second rear wall regions.
  • an area formed by the at least one first rear wall area (and preferably by the plurality of first rear wall areas) and/or by the at least one second rear wall area (and preferably by the plurality of second rear wall areas) covers (at least in some areas and preferably substantially completely) an area which is arranged in a beam path and in particular by a plurality of (in particular possible) beam paths of ambient radiation (which penetrates from the outside through the light exit surface into the light guide body and in particular is directed out of the light guide body in the direction of the rear wall device).
  • a (in particular every) first rear wall region absorbs a higher (in particular relative, i.e. for example in relation to a respective cross-sectional area of the rear wall device parallel to the main extension plane) proportion of (predetermined) ambient radiation striking the corresponding rear wall region than a (in particular every) second rear wall region arranged (at the same position and with the same area).
  • a (in particular every) second rear wall region could be provided by a rough, light and in particular white rear wall region, while for example a (in particular every) first rear wall region can be provided by a colored or reflective region and/or a region with a light trap.
  • a ratio of the cross-sectional areas of the total number of first rear wall regions (described in more detail in the previous paragraph) to the cross-sectional areas of the total number of second rear wall regions (described in more detail in the previous paragraph) is in a range between 1:20 and 20:1, preferably in a range between 1:10 and 10:1, preferably in a range between 1:5 and 5:1, preferably in a range between 1:3 and 3:1, preferably in a range between 1:2 and 2:1 and particularly preferably in a range between 0.8 and 1.2, particularly preferably (essentially) around 1.
  • the respective cross-sectional area refers in particular to a section through a respective rear wall region along a plane parallel to the main extension plane of the side of the rear wall device facing the light body and/or to a section through a respective rear wall region along a plane parallel to the light exit side and/or the rear side of the light body.
  • a ratio of the cross-sectional areas of the total number of these first rear wall areas to the cross-sectional areas of the total number of these second rear wall areas is in a range between 1:20 and 1, preferably in a range between 1:10 and 1, preferably in a range between 1:5 and 1, preferably in a range between 1:4 and 1, preferably in a range between 1:3 and 1, preferably in a range between 1:2 and 1 and especially in a range between 1.5 and 1.
  • the focus is preferably on the light output and/or good homogeneity/wide range of visibility angles (e.g. a rough bright (especially white) back wall area.
  • a ratio of the cross-sectional areas of the total number of these first rear wall regions to the cross-sectional areas of the total number of these second rear wall regions is in a range between 1 and 20:1, preferably in a range between 1 and 10:1, preferably in a range between 1 and 5:1, preferably in a range between 1 and 4:1, preferably in a range between 3 and 3:1, preferably in a range between 2 and 2:1 and particularly in a range between 1 and 1.5.
  • the focus is preferably on reducing color desaturation.
  • the light module has a microstructured rear wall device, in particular by a plurality of first and/or second rear wall regions, wherein preferably the first rear wall regions (in particular each) have and/or form a light trap and/or a cavity.
  • the light module (particularly preferably in the case of a microstructured rear wall device and/or in the embodiment in which the first rear wall regions (in particular each) have and/or form and/or delimit a light trap and/or a cavity) has more than 10, preferably more than 50, preferably more than 100, preferably more than 500 and particularly preferably more than 1000 first and/or second rear wall regions.
  • the light module (particularly preferably in an embodiment in which the first rear wall regions differ from the second rear wall regions, in particular exclusively, in terms of their material properties and/or surface properties and in particular this results in a different absorption and/or reflection property between the first second rear wall regions) has at least 1, preferably at least 2, preferably at least 3, preferably at least 5 and/or at most 10, preferably at most 5, preferably at most 4, preferably at most 3, preferably at most 2 and particularly preferably exactly one first and/or second rear wall region(s).
  • first and/or second rear wall region extends substantially over the entire rear wall device (on the side facing the light body) and encloses and surrounds at least one and preferably a plurality of the respective other (i.e. second or first) rear wall regions.
  • a first (or alternatively a second) rear wall region extends along an outer circumference of the light module and/or the rear wall region and/or essentially follows a circumferential line of the light module at least in sections.
  • a second (or according to the above alternative a first) rear wall region is provided in a central and/or inner region of the light module and/or the rear wall device (in With respect to the cross-sectional plane parallel to the main extension device of the rear wall device).
  • the rear wall device is an injection-molded part.
  • the rear wall device is preferably one-piece and/or one-piece.
  • the rear wall device preferably comprises polycarbonate and particularly preferably the rear wall device is made of polycarbonate.
  • the first rear wall regions and the second rear wall regions are manufactured in at least one different (in particular injection molding) manufacturing step (for example, following one another in time and/or using a different pressure) and/or from a material that differs in at least one component.
  • the first rear wall regions could be or be manufactured from (in particular black) colored plastics, while the second rear wall regions consist of or can be manufactured from light-colored and in particular white plastics.
  • At least a first (or alternatively a second) and preferably all first (or alternatively a second) rear wall regions are to be cast or produced and in a second (in particular temporally subsequent) injection molding process step (with a further material different from that in the first injection molding process step) at least a second (or according to the above alternative a first) and preferably all second (or alternatively a first) rear wall regions are to be cast or produced.
  • At least one collecting optic is arranged between the at least one illuminant and the side wall of the light guide body (into which the radiation of the illuminant is coupled or is to be coupled and/or can be coupled).
  • the collecting optics are suitable and intended to collect or "capture" light from an opening angle of a light emission from the light source of up to 180° and in particular to couple it into the light guide body.
  • the illuminant is preferably an electrically operated light source, which is preferably attached to at least one light entry side of the light body.
  • the light module preferably has at least one and preferably a plurality of illuminants designed as light-emitting diodes.
  • PCB printed circuit board
  • a light guide body is preferably understood to mean a body which is suitable and intended to guide (primary) radiation coupled into the light guide body, which propagates in a first region of the light guide body along a beam path extending in a first direction, in such a way that the coupled (primary) radiation propagates in a second region of the light guide body (in particular different from the first region) along a beam path extending in a second direction.
  • the first direction in particular is different from the second direction (and preferably enclose an angle other than zero and/or are skewed to one another).
  • the first region can be a region of the light guide body at which the radiation is coupled in and/or the second region can be a region of the light guide body at which the radiation is coupled out of the light guide body (i.e. in particular a region which at least partially encompasses the light exit side).
  • the radiation can be guided, for example, via the coupling-out device (coupling optics).
  • OLED organic light emitting diode
  • the radiation generated within an OLED structure runs in a straight line or orthogonally to the layer structure in which the radiation is emitted.
  • the emitted radiation (in particular created in a stack of organic layers) then passes through a glass substrate or a polymer layer.
  • the light guide body is preferably a body (preferably designed as a glass substrate and/or as a polymer layer) in which a beam path of a radiation generated (in particular by the OLED) runs essentially in a straight line within the light guide body, preferably within the entire light guide body and/or from its entry area into the light guide body to its exit area from the light guide body.
  • the light guide body is preferably a body in which the radiation coupled into the light guide body propagates (essentially) along a rectilinear propagation direction or a (essentially) rectilinear beam path until it is coupled out of the light guide body (and/or to the light exit side).
  • This embodiment of a light module preferably has the at least one (and preferably exactly one) illuminant designed as an OLED and the light guide body, which is suitable and intended to guide or transmit radiation emanating from the illuminant and coupled into the light guide body to a light exit surface of the light guide body.
  • a light entry side of the light guide body, into which radiation emanating from the illuminant is coupled into the light guide body, is arranged on a side of the light guide body opposite the light exit surface.
  • the light guide body is a, in particular (clearly) transparent (outer) light disc.
  • This embodiment of a light module preferably has at least one rear wall device which is arranged at least in regions in the beam path of an ambient radiation incident from outside into the light guide body through the light exit side of the light guide body.
  • the rear wall device has at least one first rear wall region and at least one second rear wall region, wherein the at least one first rear wall region and the at least one second rear wall region differ from one another with regard to a reflection and/or absorption property, in particular with regard to the ambient radiation.
  • the rear wall device can have all of the features described above in the context of the light module, individually or in combination with one another.
  • This proposed (alternative) embodiment offers the advantage that, for example, multi-colored OLEDs (e.g. red/yellow) behind a clearly transparent outer light panel (particularly when exposed to external (daylight) light) can suffer from the color desaturation (described above).
  • multi-colored OLEDs e.g. red/yellow
  • a clearly transparent outer light panel particularly when exposed to external (daylight) light
  • the use of a rear panel proposed above is also conceivable (particularly in an analogous manner) for (e.g. transparent) OLEDs.
  • the OLED is preferably a multi-colored OLED (which, for example, emits red and/or yellow light).
  • the OLED is preferably a transparent OLED.
  • the rear wall device is particularly preferably a structured rear wall device and/or a rear wall device in which the at least one first rear wall region differs from the at least one second rear wall region at least in regions and preferably over the entire first rear wall region by a surface geometry and thereby causes a different reflection and/or absorption property.
  • the (particularly a non-transparent) OLED has a rear wall, in particular its own (in particular produced as part of the manufacturing process of the OLED) with at least the first rear wall region and the at least the second rear wall region.
  • the OLED forms the rear wall device itself and/or is integrally connected to the rear wall device.
  • a structured rear wall device could be created as part of the manufacturing process of the OLED by masking and/or vapor deposition of (various) sub-areas.
  • the present invention is further directed to a lighting device, preferably a lamp, in particular a rear light and/or direction indicator (or blinker), and/or a lighting device for exterior and/or interior lighting, for a Vehicle preferred to fulfill at least one (described above) lighting function of the vehicle.
  • a lighting device preferably a lamp, in particular a rear light and/or direction indicator (or blinker), and/or a lighting device for exterior and/or interior lighting, for a Vehicle preferred to fulfill at least one (described above) lighting function of the vehicle.
  • the lighting device comprises at least one light module and preferably a plurality of light modules according to at least one embodiment described above.
  • the plurality of light modules is preferably provided as a light unit in which the plurality of light modules are integrally connected to one another.
  • the light modules can be arranged and/or fastened on a common circuit board, which also carries the lighting means assigned to the light bodies.
  • the lighting device is preferably a vehicle light, in particular a rear light (in particular a tail light) or a direction indicator (in particular a blinker).
  • the lighting device is preferably a lighting device for exterior and/or interior lighting.
  • the present invention is further directed to a vehicle, in particular a motor vehicle, with at least one lighting device according to an embodiment described above and preferably with at least two lighting devices according to the embodiment described above.
  • vehicle can in particular be a (motorized) road vehicle.
  • the present invention is further directed to a method for reducing, preferably for suppressing, a color desaturation in a light module, preferably for a lighting device, in particular of a vehicle, which occurs under the influence of ambient radiation, in particular when the light module is (externally) illuminated with ambient radiation, when (in particular during) the fulfillment of a lighting function by means of the light module.
  • the light module has at least one illuminant and preferably a light guide body, which is suitable and intended to guide radiation emanating from the illuminant and coupled into the light guide body to a light exit surface of the light guide body, in particular to the exit from the light guide body.
  • the at least one illuminant emits radiation, which is preferably coupled into the light guide body (in particular by means of a coupling optics) and preferably is guided to the light exit surface of the light guide body via a coupling-out device (in particular a coupling-out optics) and/or a light guide device, wherein the radiation exits the light guide body in particular at the light exit surface.
  • a coupling-out device in particular a coupling-out optics
  • the light module further comprises at least one rear wall device which is arranged at least in part in the beam path of an ambient radiation incident from outside, preferably through the light exit surface of the light guide body into the light guide body and/or into the light module,
  • the rear wall device has at least a first rear wall region and at least a second rear wall region.
  • the ambient radiation is absorbed and/or reflected to different degrees by the at least one first rear wall region and the at least one second rear wall region.
  • Different degrees of absorption and/or reflection are understood in particular to mean that a different proportion of the irradiated (ambient) radiation is absorbed and/or reflected and/or backscattered and/or reflected back in the direction of the light guide body by the at least one first rear wall region in comparison to the at least one second rear wall region (in particular in the case of identical irradiation of (ambient) radiation and preferably substantially over the entire rear wall region in each case).
  • the different strengths of absorption and/or reflection are preferably caused by a different absorption and/or reflection property of the at least one first rear wall region compared to the at least one second rear wall region.
  • the (existing) rear wall is structured to minimize color desaturation.
  • different colors or surface textures create (first and/or second) (rear wall) areas with different absorption and/or reflection. These areas are advantageously designed as a pattern or geometric shape in order to achieve an attractive design appearance.
  • the good homogeneity of a large range of visibility angles of a rough, light (preferably white) rear wall is advantageously combined with the reduced color desaturation of a colored or reflective area.
  • the pattern, shape, color and/or reflectance and/or structure size can be varied for different embodiments.
  • the present invention is further directed to a method for operating a lighting device according to one of the embodiments described above, in particular a headlight or lamp, preferably for a vehicle, for fulfilling a lighting function of the vehicle.
  • the light module described above is designed, suitable and/or intended to carry out the method for reducing color desaturation and all method steps already described above in connection with the method individually or in combination with one another.
  • the method can be equipped with all features described in the context of the light module individually or in combination with one another.
  • the vehicle can be a motor vehicle, which is in particular a motor vehicle controlled by the driver himself ("driver only"), a semi-autonomous, autonomous (for example autonomy level 3 or 4 or 5 (of the SAE J3016 standard)) or self-driving motor vehicle.
  • the autonomy level 5 refers to fully automated vehicles.
  • the vehicle can also be a driverless transport system.
  • the vehicle can be controlled by a driver or drive autonomously.
  • the vehicle may also be an air taxi, an aircraft or another means of transport or another type of vehicle, such as an air, water (e.g. ship) or rail vehicle.
  • the present invention of a light module and a lighting device of a vehicle have been described in connection with a vehicle.
  • the present invention can also be applied to other light modules or lighting devices or lighting systems, such as in the field of general transportation (aircraft construction, rail vehicles, shipbuilding), in the field of general lighting, in the field of advertising lighting or in the field of consumer electronics, and/or to light functions to be fulfilled (for example lighting and/or illumination) from these fields.
  • the applicant reserves the right to develop a light module for a lighting device from one of the areas mentioned and/or a Use of the described light module or lighting device or operation of a light module or lighting device for this purpose can also be claimed.
  • Fig.1 a and b show a comparative representation of a tail light operated at night according to the prior art 12a ( Fig. 1a ) and the tail light 12a operated during the day under the influence of ambient radiation ( Fig. 1b ) (each in plan view of the light emitting surface or the luminous surface or a lens of the vehicle lamp).
  • the Figures 1c a direction indicator operated at night according to the state of the art 14 and, in comparison thereto, the direction indicator operated during the day (under the influence of ambient radiation) 14 (in each case in a plan view of the light exit surface or the luminous surface or of a lens of the vehicle lamp).
  • the vehicle lights 12a and 14 each work at night (and thus without the influence of ambient radiation or without external illumination of the vehicle lamp with ambient radiation) has a richer color tone or emits light with a richer color tone than during the day (under the influence of ambient radiation or with external illumination of the vehicle lamp with ambient radiation).
  • the Fig. 1a - 1d illustrate the (undesirable) color desaturation that occurs, for example, in white tail light elements according to the state of the art during the day behind transparent light panels and, for example, in 3D LED tail lights.
  • Figs. 16 - 19 show representation to illustrate the theory of color desaturation at dusk or during the day.
  • Fig. 16 shows a transmission at night.
  • the LED spectrum 94 is generated, the radiation L is coupled into a white, diffuse disk 96 and emerges as light emission LE on the side of the disk 96 facing the external environment. This emitted radiation is perceptible by an observer 100.
  • the observer When looking at the side of the disk 96 facing the external environment, the observer essentially perceives the Fig. 18 LED spectrum 94 shown, the perceived color of which (such as in the image of a tail light 12a at night) corresponds to the cross marked by the arrow P1 in the color space 102 of the Fig. 18 is shown.
  • Fig. 17 represents a corresponding situation during the day or at dusk.
  • the observer 100 perceives a superposition of the light LE transmitted through the white diffuse disk, which has the LED spectrum 94, and ambient radiation TE, which results after reflection of ambient radiation T radiated onto the white, diffuse disk 96 according to the daylight spectrum 98.
  • the perceived spectrum corresponds to a superposition of the LED spectrum 94 and the daylight spectrum 98 and results in the Figure 19
  • the spectrum 104 shown is the result of the superposition of the LED spectrum and the daylight spectrum. This results in a different perceived color, which is desaturated compared to the LED spectrum alone (see illustration 12b). This desaturation is illustrated by the color value marked with arrow P2 in the color space 102, which is obtained by transmission of the LED radiation and reflection of daylight radiation.
  • FIG. 3 shows a schematic cross-sectional view of a light module 10 according to the invention according to an embodiment, here a surface light guide with a beam trap.
  • the reference number 24 designates a light guide body, which here is a surface light guide, with output optics (or an output device).
  • the embodiment shown also has a rear wall device 20 designed as a rear wall (here formed as a single piece).
  • the reference number 28 designates a cover or a frame which is arranged here on the light exit side of the light guide body (which has the light exit surface A), in an outer edge region of the light guide body.
  • the reference symbol E indicates the course of a main extension plane of the side of the rear wall device 20 or the rear wall 22 facing the light guide body 24, which extends perpendicular to the plane of the figure (in particular through the dashed line marked with E). This preferably runs (as shown here) parallel to the light exit surface A and/or parallel to the rear side of the light guide body 24 opposite the light exit surface A.
  • Figure 4 shows a detailed view of a section of the Fig.3 illustrated light module 10 according to the invention.
  • the same reference numerals designate in particular the same or equivalent or similarly acting elements.
  • the (optical) coupling-out device (which here has a sawtooth-shaped cross-section) formed here by the light guide body 24 (by a surface structure) can be seen.
  • This coupling-out device is suitable and intended to direct (primary) radiation 40 originating from the light source (here an LED) in the direction of the light exit surface A, so that the primary radiation 42 directed or scattered in the direction of the light exit surface A can exit the light guide body 24 (and from the light module) via the light exit surface A.
  • the light source here an LED
  • the reference number 22 designates the one-piece and one-piece (and made of one material in particular in exclusively common process steps or in a single injection molding process step) designed rear wall (which here forms the rear wall device 20).
  • This has a second rear wall area 34 on its side facing the light guide body.
  • four (at least partially shown) second rear wall areas 34 can be seen.
  • These second rear wall areas 34 are each a reflection surface (of the rear wall).
  • the reference number 32 designates a first rear wall area, which here delimits a beam trap 31.
  • Fig.4 three first rear wall areas 32 can be seen. All first and second rear wall areas are identical and arranged periodically.
  • the first rear wall areas extend from the main extension plane E (see Fig.3 ) into the interior of the rear wall.
  • the light trap and/or the first rear wall region is inclined relative to the main extension plane E of the rear wall device 20 such that a bottom region of the first rear wall region 32 is arranged closer to the light source (here the light-emitting diode 19) in (exclusively) a direction running along the main extension plane E than an opening region and/or an edge region of the light trap or the first rear wall region 32 (which adjoins a second rear wall region 34).
  • Fig.4 illustrated beam path of an ambient radiation 44 incident from outside through the light exit surface A into the light guide body 24 is evident, this is received and absorbed in the light trap 31 formed and/or limited by the first rear wall region 32 (illustrated by beam path 45), so that at least no directed back reflection of the ambient radiation 44 leaves the light trap 31 (at least in the direction of the light exit surface A).
  • the secondary radiation of the primary radiation emitted by the light-emitting diode and coupled into the light-guiding body, which is generated or created at the coupling device of the light-guiding body 24, is reflected here at the reflection surface of the second rear wall area (in Direction of the light guide body) (see secondary LED beam path 48) and/or reflected and/or scattered in an upper region of the light trap or the first rear wall region from a wall side 47 further away from the light source in the direction of the light exit surface A of the light guide body (illustrated by the beam path identified by reference numeral 46), so that this secondary radiation 48 is not absorbed in the light trap but advantageously contributes to increasing the light intensity and light yield of the light module 10.
  • FIGS. 2a and 2b show representations of a front view of a rear wall device 16 and 18 of a light module 10 according to the invention according to an embodiment (where only the rear wall is shown).
  • a structured rear wall (with beam trap) is visible here, with a plurality of first and second rear wall areas periodically or regularly row by row (see Fig. 2a ) and arranged in a checkerboard pattern.
  • the (existing) rear wall be periodically structured so that a radiation trap is created and external light is absorbed. This reduces or prevents the color desaturation of externally illuminated optical surfaces while at the same time fulfilling the desired lighting function as best as possible.
  • the proposed design provides a scalable approach (area size of the rear wall) that is characterized by low production costs and volume production.
  • Figure 6 shows a schematic cross-sectional view of a light module 10 according to the invention according to a further embodiment, in particular with a structured rear wall for a surface light guide 24.
  • a first rear wall region 56 consists of a first material which differs from a second material of the two second rear wall regions 57 and 58.
  • the first material differs from the second material in particular by a scattering property (particularly with regard to ambient radiation, which is preferably light from the wavelength range of a daylight spectrum).
  • Figure 7 shows a detailed view of a section of the Fig.6 illustrated light module 10 according to the invention.
  • the different scattering of the incident ambient radiation 44 at the points 51 and 52 here illustrated by the scattered radiation identified by the reference numeral 53 and by the reference numeral 54, illustrates a different scattering property present at the points 51 and 52.
  • Point 51 is a point of the first rear wall region 56 and point 52 is a point on the surface of the second rear wall region 57.
  • the material of the second rear wall region (at and around point 52) is suitable and intended for (relatively) strong scattering, while the material of the first rear wall region is suitable and intended for (relatively) low scattering of the incident ambient radiation 44.
  • FIGS. 5a and 5b show a front view 59a and a night view 59b (the one in Fig. 5a ) shown vehicle lamp) of a vehicle lamp according to the invention according to a further embodiment.
  • a first rear wall area and (exactly) a second rear wall area are provided, which form the rear wall of a light guide body.
  • a (particularly second) rear wall area extending along an edge area, in the night appearance (see Fig.
  • a grid-shaped pattern with areas of lower intensity 61a and higher light intensity 61b is shown in accordance with the arrangement of the first and second rear wall areas.
  • a grid-shaped area 62a of lower intensity with grid-hole-shaped areas 62b of higher light intensity also arise in the nighttime appearance.
  • FIGS. 8a, 8b, 9 and 10 illustrate an embodiment of a light module according to the invention or of a structured rear wall for surface light guides according to a further embodiment, in which a plurality of first rear wall regions 66 (with in particular a material, such as a dark and in particular black colored material with low scattering) and a plurality of second rear wall regions 67 are provided, which form a (here in particular grid-shaped) pattern (see Fig. 8a, 8b ).
  • first rear wall regions 66 with in particular a material, such as a dark and in particular black colored material with low scattering
  • second rear wall regions 67 which form a (here in particular grid-shaped) pattern
  • the Figures 11a, 11b and 12 illustrate an embodiment of a light module according to the invention or a structured back wall for surface light guides according to yet another embodiment, in which, in comparison to the one in the Figures 8a, 8b and 9
  • the rear wall or the rear wall device 20 has an inverted pattern.
  • the base body of the rear wall 22 consists of dark and in particular black colored material, which forms the first rear wall regions 74 on its surface, while a preferably light material (in particular white material) is arranged in recesses in this base body and accordingly forms a plurality of second rear wall regions 73.
  • Figures 11a and 11b shown front view 71 and the night appearance 72 compared to the Figures 8a and 8b inverted image.
  • FIG.7 Analogous to Fig.7 show the Figures 10 and 13 each a detailed representation of a section of the Fig.9 or Fig. 12 illustrated light module 10 according to the invention according to a further embodiment. For an explanation of these figures, reference is therefore made to Fig.7 referred to.
  • the Figures 14 and 15 show three representations of a tail light ( Fig. 14 ) or a turn signal ( Fig. 15 ) with an implementation of a rear wall with a different pattern.
  • the top figures 82, 88 represent a black/white pattern of the structured rear wall for a surface light guide
  • the middle figures 84, 90 each with a pattern that is inverted compared to the top figures 82, 88, i.e. a white/black pattern of the structured rear wall for the surface light guide
  • the bottom figures 86 and 92 each show a (pure) white rear wall.
  • the tail light and the indicator differ from each other in their lighting function, in particular in the Color value of the emitted (LED) radiation. While the color of the tail light is red, the color of the emitted light (or light transmitted from the LED) of the indicator is orange or yellow.
  • Fig. 20 shows a vehicle 1 with two lighting devices 2 according to the invention, each of which has at least one light module 10 according to the invention and which serve as rear lights.
  • a control unit 5 is suitable and intended for controlling the lighting devices 2 via signal and control lines S.
  • the reference number 2a designates a body-side part of the lighting device and the reference number 2b designates a tailgate-side part of the lighting device 2.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)

Claims (15)

  1. Module lumineux (10) pour un dispositif d'éclairage (2) d'un véhicule (1), comprenant au moins un agent lumineux (19) et un corps de guidage de lumière plan (24) qui est adapté pour et destiné à guider un rayonnement (40) émanant de l'agent lumineux (19) et injecté dans le corps de guidage de lumière (24) jusqu'à une surface de sortie de lumière (A) du corps de guidage de lumière (24), et comprenant au moins un équipement de paroi arrière (20) qui est disposé au moins par endroits dans la trajectoire de faisceau d'un rayonnement ambiant (44) incident dans le corps de guidage de lumière (24) de l'extérieur à travers le côté sortie de lumière (A) du corps de guidage de lumière (24), dans lequel l'équipement de paroi arrière (20) présente au moins une première zone de paroi arrière (32, 56, 67) et au moins une deuxième zone de paroi arrière (34, 57, 66), dans lequel ladite au moins une première zone de paroi arrière (32, 56, 67) et ladite au moins une deuxième zone de paroi arrière (34, 57, 66) se distinguent l'une de l'autre en ce qui concerne une propriété de réflexion et/ou d'absorption, en particulier en ce qui concerne le rayonnement ambiant (44), caractérisé en ce que l'équipement de paroi arrière (20) est disposé à l'opposé du corps de guidage de lumière de telle sorte qu'un rayonnement émanant d'une face arrière du corps de guidage de lumière (24) en direction de l'équipement de paroi arrière (20) est incident directement sur l'équipement de paroi arrière (20).
  2. Module lumineux (10) selon la revendication 1, caractérisé en ce qu'un matériau de ladite au moins une zone de paroi arrière (32, 56, 67) est différent d'un matériau de ladite au moins deuxième zone de paroi arrière en termes de propriété d'absorption et/ou de propriété de réflexion.
  3. Module lumineux (10) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un état de surface de ladite au moins une première zone de paroi arrière est différent d'un état de surface de ladite au moins deuxième zone de paroi arrière.
  4. Module lumineux (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite au moins une première zone de paroi arrière (32, 56, 67) se distingue au moins par endroits et de préférence sur toute la première zone de paroi arrière de ladite au moins une deuxième zone de paroi arrière (34, 57, 66) par une géométrie de surface et en ce que cela provoque une propriété de réflexion et/ou d'absorption distinctive(s).
  5. Module lumineux (10) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une direction d'étendue principale d'une partie de la première zone de paroi arrière forme avec une direction d'étendue principale de la deuxième zone de paroi arrière et/ou avec un plan d'étendue principale (E) d'un côté, tourné vers le corps de guidage de lumière, de l'équipement de paroi arrière un angle différent de zéro et de préférence un angle dans une plage comprise entre 20° et 80° avec ceux-ci.
  6. Module lumineux (10) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une direction d'étendue principale de ladite au moins une première zone de paroi arrière (32) s'étend en oblique par rapport au plan d'étendue principale.
  7. Module lumineux (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite au moins une première zone de paroi arrière (32) limite au moins par endroits une cavité, en particulier pour recevoir un rayonnement ambiant (44) incident dans le corps de guidage de lumière (24) de l'extérieur à travers la surface de sortie de lumière (A) du corps de guidage de lumière (24).
  8. Module lumineux (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite au moins une première zone de paroi arrière (32) présente et/ou réalise un piège de lumière (31).
  9. Module lumineux (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite au moins deuxième zone de paroi arrière (32) présente au moins par endroits un revêtement absorbant.
  10. Module lumineux (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite au moins deuxième zone de paroi arrière (34, 57, 66) présente des nanomatériaux pour absorber un rayonnement ambiant incident.
  11. Module lumineux (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'équipement de paroi arrière (20) présente une pluralité de premières zones de paroi arrière (32, 56, 67), en particulier identiques, et/ou une pluralité de deuxièmes zones de paroi arrière (34, 57, 66), en particulier identiques.
  12. Module lumineux (10) selon la revendication précédente, caractérisé en ce que la pluralité de premières zones de paroi arrière (32, 56, 67), en particulier identiques, et/ou la pluralité de deuxièmes zones de paroi arrière (34, 57, 66), en particulier identiques, est agencée périodiquement.
  13. Module lumineux (10) selon la revendication précédente, caractérisé en ce que la pluralité de premières zones de paroi arrière (32, 56, 67), en particulier identiques, et/ou la pluralité de deuxièmes zones de paroi arrière (34, 57, 66), en particulier identiques, est agencée en forme de bande ou en forme de grille.
  14. Véhicule (1), en particulier véhicule automobile, comprenant au moins un dispositif d'éclairage (2) pour un véhicule pourvu d'au moins un module lumineux (10) selon la revendication précédente, et de préférence au moins deux dispositifs d'éclairage (2) pour un véhicule pourvu d'au moins un module lumineux (10) selon la revendication précédente.
  15. Procédé permettant de diminuer une désaturation de couleur sur un module lumineux (10) pour un dispositif d'éclairage (2) d'un véhicule (1) qui se produit sous l'effet d'un rayonnement ambiant (44) lorsqu'une fonction d'éclairage est remplie au moyen du module lumineux (10), dans lequel pour remplir la fonction d'éclairage, le module lumineux (10) présente au moins un agent lumineux (19) et un corps de guidage de lumière plan (24) qui est adapté pour et destiné à guider un rayonnement (40) émanant de l'agent lumineux (19) et injecté dans le corps de guidage de lumière (24) jusqu'à une surface de sortie de lumière (A) du corps de guidage de lumière (24), et comprenant au moins un équipement de paroi arrière (20) qui est disposé au moins par endroits dans la trajectoire de faisceau d'un rayonnement ambiant (44) incident dans le corps de guidage de lumière (24) de l'extérieur à travers le côté sortie de lumière (A) du corps de guidage de lumière (24), caractérisé en ce que l'équipement de paroi arrière (20) présente au moins une première zone de paroi arrière (32, 56, 67) et au moins une deuxième zone de paroi arrière (34, 57, 66), dans lequel le rayonnement ambiant de ladite au moins une première zone de paroi arrière (32, 56, 67) et de ladite au moins une deuxième zone de paroi arrière (34, 57, 66) est absorbé et/ou réfléchi plus ou moins fortement, dans lequel l'équipement de paroi arrière (20) est disposé à l'opposé du corps de guidage de lumière de telle sorte qu'un rayonnement émanant d'une face arrière du corps de guidage de lumière (24) en direction de l'équipement de paroi arrière (20) est incident directement sur l'équipement de paroi arrière (20) .
EP21183052.6A 2021-07-01 2021-07-01 Module d'éclairage pour dispositif d'éclairage d'un véhicule et procédé de réduction d'une désaturation de la couleur dans un module d'éclairage pour un dispositif d'éclairage d'un véhicule Active EP4113001B1 (fr)

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EP21183052.6A EP4113001B1 (fr) 2021-07-01 2021-07-01 Module d'éclairage pour dispositif d'éclairage d'un véhicule et procédé de réduction d'une désaturation de la couleur dans un module d'éclairage pour un dispositif d'éclairage d'un véhicule
CN202210778846.2A CN115560263A (zh) 2021-07-01 2022-06-30 光模块和用于减小光模块中的颜色去饱和的方法
US17/856,350 US11988355B2 (en) 2021-07-01 2022-07-01 Light module for a lighting device of a vehicle and method for reducing a color desaturation in a light module for a lighting device of a vehicle
US18/656,912 US12516790B2 (en) 2021-07-01 2024-05-07 Light module for a lighting device of a vehicle and method for reducing a color desaturation in a light module for a lighting device of a vehicle

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KR20230036228A (ko) * 2021-09-07 2023-03-14 현대자동차주식회사 블랙 이미지 타입 히든 라이트 램프 및 차량
EP4166843B1 (fr) * 2021-10-18 2024-04-03 Volkswagen Ag Dispositif d'éclairage pour un véhicule automobile
KR20230114988A (ko) * 2022-01-26 2023-08-02 현대자동차주식회사 다면 반사식 히든 라이팅 램프 및 차량

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JP4733009B2 (ja) * 2006-01-30 2011-07-27 豊田合成株式会社 車両用灯具
DE102006059980A1 (de) * 2006-12-19 2008-06-26 Daimler Ag Leuchteinheit für einen Kraftwagen
JP4642012B2 (ja) * 2006-12-27 2011-03-02 豊田合成株式会社 車両用灯具
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US20240288143A1 (en) 2024-08-29
US11988355B2 (en) 2024-05-21
US12516790B2 (en) 2026-01-06
CN115560263A (zh) 2023-01-03
US20230003360A1 (en) 2023-01-05

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