EP4113001A1 - 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
EP4113001A1
EP4113001A1 EP21183052.6A EP21183052A EP4113001A1 EP 4113001 A1 EP4113001 A1 EP 4113001A1 EP 21183052 A EP21183052 A EP 21183052A EP 4113001 A1 EP4113001 A1 EP 4113001A1
Authority
EP
European Patent Office
Prior art keywords
rear wall
light
wall area
area
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.)
Pending
Application number
EP21183052.6A
Other languages
German (de)
English (en)
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/EP4113001A1/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
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • 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
    • 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
    • F21S43/10—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
    • 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
    • F21S43/20—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
    • F21S43/33—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

  • the present invention relates 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 for guiding 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 also relates to a lighting device and a method for reducing color desaturation in a light module, preferably for a lighting device, in particular for a vehicle.
  • Lighting devices for vehicles have long been known from the prior art.
  • a lighting device of a vehicle usually fulfills at least one lighting function.
  • the light function can be selected from a group of light functions which have an illumination function (such as a roadway area), a repeating flashing light function, for example to indicate 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 night, and the like, as well as combinations thereof.
  • an illumination function such as a roadway area
  • a repeating flashing light function for example to indicate the direction of travel
  • a brake light function to indicate braking activity
  • a side light function such as a rear light function
  • a light module for a motor vehicle with a flat light body and a light source is known, the light beams 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 reflecting or diffusely backscattering cover, which is formed by a frame-like component.
  • color desaturation occurs in 3D LED rear lights, such as in the case of tail light and direction indicator surfaces, for example from the applicant's internal prior art.
  • the present invention is based on the object of overcoming the disadvantages known from the prior art and 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 reduces color desaturation and thus offer an improvement in the light function, especially during the day.
  • the light guide is suitable and intended for directing radiation emanating from the light source and coupled into the light guide to a light exit surface of the light guide (in particular for exiting from the light guide ) to direct.
  • the light module has at least one rear wall device which is preferably at least partially in the beam path of ambient radiation incident from the outside through the light exit surface of the light-guiding body into the light-guiding body is arranged.
  • the light exit surface is preferably a substantially planar (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 area and at least one second rear wall area, with the at least one first rear wall area and the at least one second rear wall area differing with regard to a reflection and/or absorption property, in particular with regard to the ambient radiation (or an ambient radiation, which is incident from the outside through the light exit surface in the fiber optic body), differ from each other.
  • a rear wall device which has at least two rear wall regions, in particular on its side facing the light guide body, 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 impinging on the rear wall device.
  • the at least one first and second rear wall region proposed according to the invention can advantageously reduce the color desaturation of externally illuminated optical surfaces while at the same time fulfilling the desired light function in the best possible way.
  • the at least one first and/or the at least one second rear wall area is preferably arranged in the beam path of ambient radiation incident from outside through the light exit side of the light-guiding body into the light-guiding body.
  • the at least one first rear wall area is preferably designed in such a way and the absorption and/or reflection properties are preferably selected in such a way that, in particular, absorption and/or (diffuse) scattering or reflection of the radiation impinging on the first rear wall area causes the spectrum of the
  • the radiation emerging from the light exit surface essentially corresponds to the spectrum of the radiation exiting from the light exit surface and coupled into the light-conducting body by the at least one illuminant and/or deviates only slightly from this. An only slight deviation can in particular be understood to mean that a user of the light function cannot (essentially) visually perceive any difference or that this is within a (preferably predetermined) tolerance range.
  • the at least one first rear wall area is matched to a light function to be performed by the light module (e.g. output of light of a specified spectrum) in such a way that it is suitable and intended for wavelength-selective activation depending on the specified spectrum or spectrum to be output absorbing (and/or reflecting) radiation striking the at least first rear wall region.
  • a light function to be performed by the light module e.g. output of light of a specified spectrum
  • the first rear wall area can have a colored or a reflective (surface) area.
  • the color of the rear wall area can preferably be adapted to the spectrum to be output by the light module and/or the light function to be fulfilled by the light module.
  • the first rear wall area preferably has the color of the radiation to be emitted by the light module.
  • the at least one second rear wall area is preferably designed in such a way and the absorption and/or reflection properties are preferably selected in such a way that, in particular by reflecting the radiation impinging on the second rear wall area, homogeneity (in particular as good as possible) and/or light yield (as high as possible) and/or (as high as possible) intensity of the radiation emerging from the light exit surface is achieved.
  • the at least one second rear wall area can have a light, in particular white, and/or (comparatively) rough surface.
  • a rough surface is preferably understood to be a non-reflecting surface on which, in particular, radiation impinging on the surface is diffusely reflected.
  • the reflection property is to be understood in particular as a variable which is characteristic of a reflection and/or backscattering of incident radiation, for example a degree of reflection.
  • the term 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 one section of the at least first or second rear wall area and particularly preferably to the entire at least first or second rear wall area.
  • Absorption property is to be understood in particular as a variable which is characteristic of an absorption of incident radiation, for example a degree of absorption.
  • the absorption property preferably relates to at least one section of the at least first or second rear wall area and particularly preferably to the entire at least first or second rear wall area.
  • the absorption property and/or reflection property can relate to the light exit surface (and/or in particular in relation to a notional plane formed by the light exit surface and/or a notional plane parallel to the light exit surface) and thereby incident from the outside (and on the respective at least first or second rear wall area hitting) ambient radiation.
  • the absorption property (and analogously the reflection property) can preferably be a variable 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 on the respective (at least first or second) rear wall area, through the respective (at least first or second) rear wall area.
  • the at least first rear wall area (at least in some areas and preferably essentially over the entire rear wall area) can have an absorptance and/or reflectance that differs from the absorptivity and/or reflectance of the at least second rear wall area.
  • the at least first rear wall region preferably has an essentially homogeneous and/or identical degree of reflection and/or degree of absorption, at least in sections and preferably over its respective entire region.
  • the at least second rear wall region preferably has an essentially homogeneous and/or identical degree of reflection and/or degree of absorption, at least in sections and preferably over its respective entire region.
  • the at least first rear wall area and the at least second rear wall area preferably have a (substantially) homogeneous design and/or structure and/or surface quality and/or (surface) structure and/or color over their respective (surface) area.
  • the light body is preferably a flat light body.
  • a flat light body is understood to mean, in particular, a light body whose (geometric) extent in two of three spatial directions is clearly (preferably by at least a factor of 3, preferably by at least a factor of 4, preferably by at least one factor and particularly preferably by at least a factor of 5) is larger than in the third spatial direction.
  • the light module is preferably configured in such a way and/or the light source is arranged in relation to the light guide body in such a way that radiation emanating from the light source can be 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 to a light exit side of the light-guiding body and in particular to the light exit surface (through the light-guiding 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 an emission surface).
  • the light module and in particular the light-guiding body preferably has an (in particular optical) decoupling device, by means of which the radiation emitted from the light-guiding body on the light entry side (which is in particular a side surface of the light-guiding body), in particular laterally, is in particular (at least one primary radiation) via the light exit surface.
  • the decoupling device preferably has a multiplicity of optical decoupling elements for scattering and/or reflecting the light module emanating from the illuminant in the direction of the light exit surface.
  • the multiplicity of optical decoupling elements can have an im Have cross-section sawtooth-like and / or sawtooth-shaped profile.
  • the decoupling device can be formed by a surface profile of the light guide body.
  • the light-guiding body is preferably essentially cuboid (whereby in particular a surface structure and/or surface profiling present to form a decoupling device is not taken into account here).
  • the light exit surface and/or the light exit side is preferably surrounded by side surfaces of the light body or (directly) adjoining the side surfaces of the light guide body.
  • the rear wall device is preferably arranged behind the rear side and in particular behind the rear surface, 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 preferably 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 preferably extends (in particular in a plane parallel to the extension plane 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 ).
  • No further (optical) element is preferably arranged between the rear wall device and the light guide body.
  • the rear wall device is arranged opposite the light-guiding body in such a way that (ambient) radiation escaping from the rear of the light-guiding body, in particular in the direction of the rear wall device, impinges directly on the rear wall device, in particular without being scattered and/or reflected by another optical element beforehand to become.
  • the rear wall device adjoins the light-guiding body and in particular the rear side (in particular the rear surface) of the light-guiding body at least in certain areas.
  • both the at least first rear wall area and the at least second rear wall area are on the same element of the rear wall device arranged.
  • the rear wall device has several elements, it being conceivable that the at least one first rear wall area is arranged on one element and the at least one second rear wall area is arranged on a different element of the rear wall device.
  • the rear wall device is preferably designed as a one-piece element.
  • the light body is preferably designed as a light guide, preferably as a planar light guide, and preferably has a transmittance (light transmittance) 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 approximately 92 percent.
  • a material of the at least first rear wall area differs from a material of the at least second rear wall area in an absorption property and/or reflection property (preferably at least in certain areas and particularly preferably over the entire at least first and/or second rear wall area).
  • the material of the first rear wall area preferably has a scattering property that differs from the material of the at least second rear wall area.
  • the (at least partially) different material of the at least one first rear wall area in relation to the at least one second rear wall area preferably contributes to the different reflection and/or absorption properties of the at least first rear wall area compared to the at least second rear wall area and this is particularly preferred (also or exclusively ) caused by this.
  • a surface finish of the at least first rear wall area differs from a surface finish of the at least second rear wall area (preferably at least in certain areas and particularly preferably over the entire at least first and/or second rear wall area). This can also be advantageous different effects of the rear wall areas can be achieved with regard to color desaturation in the case of external illumination and/or homogeneity and/or intensity of the emitted radiation.
  • the (at least regionally) different surface finish of the at least one first rear wall area in relation to the at least one second rear wall area preferably contributes to the different reflection and/or absorption properties of the at least first rear wall area compared to the at least second rear wall area, and this is particularly preferred (also or exclusively ) caused by this.
  • the at least one first rear wall area differs from the at least one second rear wall area at least in some areas and preferably over the entire first rear wall area by a surface geometry, with a different reflection and/or absorption property preferably (also and preferably exclusively) as a result (of the at least one first rear wall area from the at least one second rear wall area).
  • a different effect of the rear wall areas can advantageously be achieved with regard to color desaturation in the event of external illumination and/or homogeneity and/or intensity of the emitted radiation.
  • the at least one first rear wall area (and/or the at least one second rear wall area) can have a surface geometry which is a surface geometry that deviates from a flat surface.
  • this first rear wall area 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 for receiving or absorbing radiation falling on the surface geometry (in particular radiation coming from the direction of the light-guiding body and in particular (ambient) radiation radiated through the light exit surface of the light-guiding body) and/or ( due to geometry) more than once, preferably more than twice, preferably more than three times, preferably more than four times and particularly preferably more than five times to reflect and/or throw back and/or scatter from a surface wall before it leaves the respective rear wall area.
  • the at least one second rear wall area is preferably designed to be (substantially) flat or as a flat surface, at least in sections and preferably over the entire second rear wall area.
  • the at least one first rear wall area is also (substantially) flat or configured as a flat surface, at least in sections and preferably over the entire first rear wall area.
  • the at least one first rear wall area and the at least second rear wall area are preferably designed to be (substantially) flat or as a flat surface at least in sections and preferably over the entire first rear wall area.
  • the at least first rear wall area and the at least second rear wall area differ in terms of their material properties and/or their surface properties, so that in particular this results in a different reflection and/or absorption property.
  • the at least one first rear wall area has a surface geometry deviating from a flat surface and the at least one second rear wall area is designed flat or as a flat surface.
  • the at least one first rear wall area (particularly in this case) has an identical material composition in relation to the at least one second rear wall area. It is also possible that (in particular here) the surface facility with the at least first rear wall area and the at least second rear wall area is produced from the same workpiece and/or in a common (single) process step.
  • First and/or second rear wall regions designed as flat surfaces are preferably arranged (essentially) parallel to the light exit surface of the light-guiding body and/or to the back or rear surface of the light-guiding body.
  • the at least one first and/or the at least one second (in particular all) rear wall region(s) is/are preferably aligned with respect to the light guide body and in particular with regard to the light exit surface and/or the rear or the rear surface, with the alignment preferably having an (essentially ) Optimization of an intended absorption and/or reflection (in particular at a predetermined angle) by (ambient) radiation penetrating the light exit surface into the light guide body is caused by the respective rear wall areas.
  • the side of the rear wall device and/or the surface of the rear wall device facing the light guide body which in particular has the at least one first and/or the at least one second rear wall area, preferably extends essentially along a main extension plane.
  • the rear wall device is preferably aligned with respect to the light-guiding body in such a way that the main extension plane is arranged essentially parallel to the light exit surface and/or to the rear and/or to the rear surface of the light-guiding body.
  • a main extension direction of a section of the first rear wall area (and preferably also a main extension direction of another section of the first rear wall area that differs from the first-mentioned section and/or is opposite the first-mentioned section) closes with the main extension plane of the side of the fiber-optic cable rear wall device and/or with a main extension direction of the second rear wall area and/or with a main extension direction of the light exit surface and/or the rear side of the light guide body at an angle other than zero 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 (directly) adjoining and/or adjoining a second rear wall area.
  • the two mentioned sections of the first rear wall area are parallel to one another and/or have a surface profile that is parallel to one another.
  • a main extension direction of the at least one first rear wall area runs obliquely to the main extension plane and in particular forms an angle of between 30° and 70°, preferably between 40° and 60°, preferably between 40° and 50° and particularly preferably of essentially 45 ° (between the main extension direction of the at least one first rear wall area and the main extension plane).
  • a base area of the first rear wall area is arranged closer to the light source than an opening area of the first rear wall area, in which radiation enters the first rear wall area and which is preferably in front of the base area in the direction of incidence of a radiation incident on the first rear wall area of the first rear wall area is arranged.
  • 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 essentially 45°) with a first (facing the illuminant) Side wall section of the first back wall area, which is arranged after a second side wall section (facing away from the light source) of the first back wall area, seen in this direction of incidence.
  • the at least one first rear wall region delimits a cavity in particular for receiving ambient radiation incident from outside through the light exit surface of the light-guiding body into the light-guiding body.
  • it acts in the case of the cavity, it is a cavity which is open only on one side (preferably the side facing the light-conducting body).
  • the cavity preferably has only one opening through which radiation can penetrate into 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-guiding body) and/or in a direction perpendicular to the light exit surface of the light-guiding body.
  • the cavity can be elongated and/or grooved and/or grooved and/or wavy and open to at least one end (in particular both side ends) of the elongated and/or grooved and/or grooved and/or wavy structure.
  • the cavity (and in particular a central axis of the cavity) preferably extends in a (main extension) direction which, with the main extension plane of the side and/or surface of the rear wall device facing the light body, is at an angle other than zero and preferably 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 preferably extend (substantially) parallel to the central axis and/or to the main direction of extent of the cavity.
  • An angle of 45° is particularly advantageous since radiation incident perpendicularly to the main extension plane of the rear wall device (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 area) parallel to the main extension device and (subsequently) from a further side wall of the cavity is further scattered and/or reflected 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 area 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 there is preferably a radiation receiving area which is particularly suitable and intended for receiving radiation without directed backscattering (out of the radiation receiving area).
  • a light trap is preferably understood to be a radiation receiving area that is essentially free of backscattering for the attenuation and/or absorption of unwanted (ambient) radiation and/or a radiation receiving area that is designed and intended to absorb radiation entering the radiation receiving area before it exits the radiation receiving area to reflect and/or scatter at least three times, preferably at least five times and particularly preferably at least eight times.
  • the at least second rear wall area has an absorbent coating at least in areas (and preferably over the entire rear wall area). This offers the advantage that (in particular undesired) ambient radiation impinging on the at least second rear wall area is absorbed by the absorbent coating (at least partially and preferably according to an absorption degree of the absorbent coating).
  • the absorbent coating preferably has nanoparticles and/or microparticles which are suitable and intended for absorbing (undesirable, in particular visible to humans) radiation.
  • the absorbent coating can have carbon nanotubes (also CNT, English carbon nanotubes) for absorbing radiation.
  • the at least second rear wall area has nanomaterials, in particular with an aligned structure, for absorbing incident ambient radiation.
  • the rear wall device has a multiplicity of, in particular similar and preferably identical, first rear wall regions and/or a multiplicity of, in particular similar and preferably identical, second rear wall regions.
  • each first rear wall area is formed from the multiplicity of first rear wall areas according to an embodiment described (in particular above) in the context of the at least one first rear wall area.
  • each first rear wall area from the plurality of first rear wall areas is formed in accordance with the same embodiment (in particular described above) within the scope of the at least one first rear wall area.
  • the (existing) rear wall can preferably be structured to minimize the color desaturation.
  • the proposed light module is a scalable approach which can be scaled in relation to the area size of the rear wall.
  • the proposed light module offers volume production with low production costs at the same time.
  • Each second rear wall area from the plurality of second rear wall areas is preferably formed according to an embodiment described (in particular above) within the scope of the at least one second rear wall area.
  • each second rear wall area from the plurality of second rear wall areas is formed according to the same embodiment (in particular described above) within the scope of the at least one second rear wall area.
  • 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 extent and/or the same area in relation to the main plane of extension and/or a cross-sectional plane.
  • the multiplicity of, in particular identical, first rear wall areas and/or the multiplicity of, in particular identical, second rear wall areas are arranged periodically. This offers the advantage of regular light emission from the light module.
  • a multiplicity of first rear wall areas and a multiplicity of second rear wall areas are preferably arranged in an alternating sequence. This advantageously brings about a homogeneous emission of light by the light module.
  • a first rear wall area is preferably exclusively (immediately) adjacent to and/or surrounded by second rear wall areas.
  • a second rear wall area it is also possible for a second rear wall area to be (directly) adjacent and/or surrounded exclusively by first rear wall areas.
  • the multiplicity of, in particular similar, first rear wall regions and/or the multiplicity of, in particular similar, second rear wall regions are arranged in strips and/or in a grid and/or lattice and/or checkerboard pattern. It is also conceivable for a multiplicity of first rear wall regions (each) to be arranged in rows (or along a diagonal) and/or a multiplicity of second rear wall regions (in each case) to be arranged in rows (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 attractive design appearance or a design appearance that supports better perceptibility of the outlines and/or light function.
  • the at least one first rear wall area and preferably the multiplicity of, in particular similar and/or identical, first rear wall areas and/or the at least one second rear wall area and preferably the multiplicity 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 area and/or the second rear wall area (and corresponding to an arrangement by an integer multiple of these respective geometric extensions).
  • the structure size can preferably be influenced.
  • the side and/or surface of the rear wall device (facing the light guide body) is preferably formed (at least in regions and preferably essentially 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 large number of first rear wall regions and/or a plurality of second rear wall areas.
  • 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) preferably covers (at least in areas and preferably essentially completely) an area which is arranged in a beam path and in particular by a large number of (in particular possible) beam paths of ambient radiation (which penetrates the light-guiding body from the outside through the light exit surface and is directed in particular out of the light-guiding body in the direction of the rear wall device).
  • a (in particular each) first rear wall area preferably 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 (specified) ambient radiation impinging on the corresponding rear wall area than a (at the same position and with the same area ) arranged (in particular each) second rear wall area.
  • a (in particular each) second rear wall area could preferably be a rough, light and in particular white rear wall area, while for example a (in particular each) first rear wall area can be a colored or reflective area and/or an area with a light trap.
  • a ratio of the cross-sectional areas of the total number of first rear wall regions (described in particular in more detail in the previous paragraph) to the cross-sectional areas of the total number of second rear wall regions (described in detail in particular 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 (substantially) around 1.
  • the respective cross-sectional area refers in particular to a section through a respective rear wall area along a plane parallel to the main plane of extension of the side of the light body facing Entla rear wall device and / or a section through a respective rear wall area ng a plane parallel to the light exit side and/or the back 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 preferably 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 particularly in a range between 1:5 and 1
  • Such a design preferably focuses on the luminous efficacy 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 preferably 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 especially in a range between 1 and 1.5.
  • a focus is thus preferably placed on reducing color desaturation.
  • the light module preferably has a rear wall device microstructured, in particular by a plurality of first and/or second rear wall regions, with the first rear wall regions (in particular each) preferably having and/or forming 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) preferably 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 areas each differ from the second rear wall areas, in particular exclusively, in terms of their material properties and/or surface properties and in particular as a result have different absorption and/or reflection properties between the first second rear wall areas effected) 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 (n) rear wall area (s).
  • first rear wall areas each differ from the second rear wall areas, in particular exclusively, differ in terms of their material properties and/or surface properties and in particular this causes a different absorption and/or reflection property between the first and second rear wall areas
  • first and/or second rear wall area extends essentially over the entire rear wall device (on the side facing the light body) and encloses at least one and preferably a large number of the respective other (i.e. second or first) rear wall areas and these surrounds.
  • a first (or alternatively a second) rear wall area extends along an outer circumference of the light module and/or the rear wall area 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 area is arranged in a central and/or inner area of the light module and/or the rear wall device (in relation 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 in one piece and/or in one piece.
  • the rear wall device preferably comprises polycarbonate, and the rear wall device is particularly preferably made of polycarbonate.
  • the first rear wall areas and the second rear wall areas are preferred (particularly preferred in an embodiment of the light module in which the first rear wall areas each differ from the second rear wall areas, in particular exclusively, by their material properties and/or surface properties and in particular as a result have a different absorption and/or or reflection property between the first and second rear wall areas), in at least one manufacturing step that differs from one another (in particular an injection molding process) (e.g., one after the other and/or a different pressure) and/or is made from a material that differs in at least one component.
  • the first rear wall areas could be (in particular black) colored plastics or be made of such, while the second rear wall areas could be made of light colored and in particular white plastics.
  • At least a first (or alternatively second) and preferably all first (or alternatively second) rear wall areas are cast or produced and in a second (in particular temporally subsequent) injection molding process step (with a further one different from the one in the first injection molding process step material) to cast or produce at least a second (or according to the above alternative a first) and preferably all second (or alternatively first) rear wall areas.
  • At least one collecting optic is preferably arranged between the at least one lamp and the side wall of the light guide body (into which the radiation of the lamp is coupled or can be coupled and/or can be coupled).
  • the collecting optics (or collimating optics) are preferably suitable and intended for collecting or “catching” light from an opening angle of light emission from the light source of up to 180° and in particular for coupling it into the light guide body.
  • the lighting means is preferably an electrically operable 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 large number of lamps designed as light-emitting diodes.
  • a light-guiding body is preferably understood to mean a body which is suitable and intended for guiding (primary) radiation that is coupled into the light-guiding body and propagates in a first region of the light-guiding body along a beam path extending in a first direction in such a way that the coupled-in (primary) radiation propagates in a second area (in particular different from the first area) of the light guide body along a beam path extending in a second direction.
  • the first direction is different from the second direction (and preferably enclose an angle that is different from zero and/or are skewed to one another).
  • the first area can be an area of the light-guiding body where the radiation is coupled in and/or the second area can be an area of the light-guiding body where the radiation is coupled out of the light-guiding body (i.e. in particular an area which includes the light exit side at least in regions).
  • the conduction of the radiation can be implemented, for example, via the decoupling device (decoupling optics).
  • 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 (generated in particular in a stack of organic layers) then passes through a glass substrate or a polymer layer.
  • the light-guiding body is preferably a body (preferably configured as a glass substrate and/or as a polymer layer), in which a beam path running in the light-guiding body of (or the) radiation (in particular by the OLED) generated, preferably inside of the entire light-guiding body and/or from its entry area into the light-guiding body to its exit area from the light-guiding body) essentially in a straight line.
  • the light-guiding body is preferably a body in which the radiation coupled into the light-guiding body (essentially) along a linear propagation direction or a (essentially) linear beam path until it is coupled out of the Light guide (and / or to the light exit side) propagated.
  • this embodiment of a light module has the at least one (and preferably exactly one) light source designed as an OLED and the light guide body, which is suitable and intended for guiding or directing radiation emanating from the light source and coupled into the light guide body to a light exit surface of the light guide body transmit.
  • a light entry side of the light-guiding body, into which radiation emitted by the illuminant is coupled into the light-guiding body, is preferably arranged on a side of the light-guiding body opposite the light exit surface.
  • the light-guiding body is a (clearly) transparent (outer) lens.
  • 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 ambient radiation incident from outside through the light exit side of the light guide body into the light guide body.
  • the rear wall device has at least one first rear wall area and at least one second rear wall area, the at least one first rear wall area and the at least one second rear wall area differing 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 connection with the light module, either individually or in combination with one another.
  • This proposed (alternative) embodiment offers the advantage that, for example, multicolored OLEDs (e.g. red/yellow) behind a clearly transparent outer lens (especially with external (daylight) exposure under the (described above) color desaturation can suffer.
  • multicolored OLEDs e.g. red/yellow
  • a clearly transparent outer lens especially with external (daylight) exposure under the (described above) color desaturation can suffer.
  • the use of a rear wall proposed above is also conceivable (in particular in an analogous manner) with (for example transparent) OLEDs.
  • the OLED is preferably a multicolored 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 area differs from the at least one second rear wall area at least in some areas and preferably over the entire first rear wall area by a surface geometry differs and thereby a different reflection and / or absorption property is effected.
  • the (particularly a non-transparent) OLED has its own rear wall (particularly produced during the manufacturing process of the OLED) with the at least first rear wall area and the at least second rear wall area.
  • the OLED forms the rear wall device itself, in particular, and/or is materially connected to the rear wall device.
  • a structured rear wall device could take place as part of the production process of the OLED by masking and/or vaporizing (various) partial areas.
  • the present invention is also directed to a lighting device, preferably a light, in particular a rear light and/or direction indicator (or direction indicator) and/or a lighting device for exterior and/or interior lighting, for a vehicle, preferably to fulfill at least one (described above ) light function of the vehicle.
  • a lighting device preferably a light, in particular a rear light and/or direction indicator (or direction indicator) and/or a lighting device for exterior and/or interior lighting, for a vehicle, preferably to fulfill at least one (described above ) light function of the vehicle.
  • the lighting device comprises at least one light module and preferably a multiplicity of light modules according to at least one embodiment described above.
  • the plurality of light modules is provided as a light unit in which the plurality of light modules are integrally connected to each other.
  • the light modules can be arranged and/or fastened on a common circuit board, which also carries the illuminants 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 also aimed at a vehicle, in particular a motor vehicle, having at least one lighting device according to an embodiment described above and preferably having at least two lighting devices according to the embodiment described above.
  • vehicle can in particular be a (motorized) road vehicle.
  • the present invention is also directed to a method for reducing, preferably for suppressing, color desaturation in a light module, preferably for a lighting device, in particular of a vehicle, which under the influence of ambient radiation, in particular when the light module is (externally) irradiated with ambient radiation, when (in particular while) fulfillment of a light function occurs by means of the light module.
  • the light module has at least one light source and preferably a light guide body, which is suitable and intended for guiding radiation emitted by the light source 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 at least one illuminant preferably emits radiation, which is preferably coupled into the light-guiding body (in particular by means of a coupling-in optic) and is preferably guided via a decoupling device (in particular a decoupling optic) and/or a light-guiding device to the light exit surface of the light-guiding body, with the radiation being directed in particular to the light exit surface emerges from the light guide body.
  • a decoupling device in particular a decoupling optic
  • the light module also has at least one rear wall device, which is arranged at least in regions in the beam path of ambient radiation incident from the 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 one first rear wall area and at least one second rear wall area.
  • the ambient radiation is absorbed and/or reflected to different extents by the at least one first rear wall area and the at least one second rear wall area.
  • Different levels of absorption and/or reflection mean, in particular, that the at least one first rear wall area compared to the at least one second rear wall area (particularly given identical insolation of (ambient) radiation and preferably essentially across the entire rear wall area).
  • different proportion of the irradiated (ambient) radiation is absorbed and/or reflected and/or directed backscattered and/or reflected back in the direction of the light guide body.
  • the different levels of absorption and/or reflection are preferably caused by a different absorption and/or reflection property of the at least one first rear wall area compared to the at least one second rear wall area.
  • the (existing) rear wall is structured to minimize color desaturation.
  • different colors or surface textures result in (first and/or second) (rear wall) areas of different absorption and/or reflection.
  • these areas are designed as a pattern or geometric shape in order to advantageously achieve an attractive design appearance.
  • the good homogeneity of a large range of visibility angles of a rough, light (preferably white) back wall is advantageously combined with the reduced color desaturation of a colored or reflective area.
  • the pattern, the shape, the color and/or the degree of reflection and/or the structure size can be varied for different embodiments.
  • the present invention is also aimed at 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, to fulfill a lighting function of the vehicle.
  • the light module described above is preferably set up, suitable and/or intended to carry out the method for reducing color desaturation and all the method steps already described above in connection with the method individually or in combination with one another.
  • the method can be equipped with all of the features described in connection with the light module, either individually or in combination with one another.
  • the vehicle can be a motor vehicle which, in particular, is a motor vehicle controlled by the driver himself ("driver only"), a semi-autonomous, autonomous (e.g. autonomy level level 3 or 4 or 5 (of the SAE J3016 standard). )) or self-propelled motor vehicle.
  • Autonomy Level 5 designates 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 can also be an air taxi, an airplane and another means of transport or another type of vehicle, for example an air vehicle, water vehicle (e.g. ship) or rail vehicle.
  • the present invention of a light module and a lighting device of a vehicle has been described in connection with a vehicle.
  • the present invention is also applicable 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 (general lighting), in the field of advertising lighting or in the field consumer electronics, and/or transferable to light functions to be performed (e.g. lighting and/or illumination) from these areas.
  • 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 (which is operated during the day under the influence of ambient radiation Fig. 1b ) (in each case in plan view of the light exit surface or the luminous surface or a lens of the vehicle lamp).
  • the Figures 1c a direction indicator operated at night according to the prior art 14 and, in contrast to this, the direction indicator 14 operated during the day (under the influence of ambient radiation) (in each case in a top view of the light exit surface or the luminous surface or a lens of the vehicle lamp).
  • the vehicle lights 12a and 14 each have a richer hue at night (and thus without the influence of ambient radiation or without external illumination of the vehicle light with ambient radiation) or emit light with a richer hue than during the day (under the influence of ambient radiation or with external illumination of the vehicle light with ambient radiation).
  • the Figures 1a - 1d illustrate the (undesirable) color desaturation that occurs with, for example, white taillight elements according to the prior art during the day behind transparent lenses and, for example, with 3D LED rear lights.
  • the 16 - 19 show representation to illustrate the theory of color desaturation at dusk or during the day.
  • the LED spectrum 94 is generated, the radiation L is coupled into a white, diffuse pane 96 and emerges as light emission LE on the side of the pane 96 facing the external environment. This emitted radiation can be perceived by an observer 100 .
  • the observer When looking at the side of the disk 96 facing the external environment, the observer essentially perceives the 18 94 true whose perceived color (such as in the recording of a tail light 12a at night) with the cross indicated by the arrow P1 in the color space 102 of FIG 18 is shown.
  • the observer 100 takes a superposition of the light LE transmitted through the white diffuse pane, which has the LED spectrum 94, as well as ambient radiation TE, which after reflection from ambient radiation T radiated onto the white, diffuse pane 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 in figure 19 spectrum 104 shown.
  • the superimposition of the LED spectrum and the daylight spectrum results in a different perceived color, which is desaturated in comparison to the LED spectrum alone (cf. illustration 12b). This desaturation is illustrated by the color value marked with arrow P2 in the color space 102, which color value is obtained by transmission of the LED radiation and reflection of daylight radiation.
  • FIG 3 shows a schematic cross-sectional illustration of a light module 10 according to the invention according to one embodiment, here a planar light guide with a beam trap.
  • the reference number 24 designates a light guide body, which is a surface light guide here, with decoupling optics (or a decoupling device).
  • An LED 19 or a plurality of LEDs arranged on a printed circuit board 26 (PCB) emits radiation (in particular via an in-coupling optics) into the light-guiding body 24 and guided via the out-coupling optics to the light exit surface A of the light-guiding body 24, via which the (Primary) radiation exits from the fiber optic body.
  • PCB printed circuit board 26
  • the embodiment shown also has a rear wall device 20 designed as a rear wall (designed in one piece here).
  • the reference number 28 designates a screen 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 character E designates the course of a main extension plane running perpendicular to the plane of the figure (in particular through the dashed line marked E) of the side of the rear wall device 20 or the rear wall 22 facing the light guide body 24. 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 from the in 3 illustrated light module 10 according to the invention.
  • the same reference numerals in particular denote elements that are the same or have the same effect or have a similar effect.
  • the (optical) decoupling device (which here has a sawtooth-shaped cross section) formed here by the light guide body 24 (by a surface structure) can be seen from this detailed representation.
  • This decoupling device is suitable and intended for directing the (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 is emitted via the light exit surface A the light guide body 24 (and from the light module) can exit.
  • the light source here an LED
  • the reference number 22 designates the rear wall (which here forms the rear wall device 20 ) designed in one piece and in one piece (and made from one material in particular in exclusively common process steps or produced in a single injection molding process step).
  • This has a second rear wall area 34 on its side facing the light guide body.
  • Four (at least partially shown) second rear wall regions 34 can be seen in the detailed illustration. These second rear wall areas 34 are each a reflection surface (of the rear wall).
  • Reference number 32 designates a first rear wall area, which delimits a beam trap 31 here. In the detail view of 4 three first rear wall regions 32 can be seen. All the first and second rear wall areas are designed identically here and are arranged periodically.
  • the first rear wall areas extend from the main extension plane E (see 3 ) away into the interior of the rear wall.
  • the light trap and/or the first rear wall area is preferably inclined in relation to the main extension plane E of the rear wall device 20 in such a way that a bottom area of the first rear wall area 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 is as an opening area and/or an edge area of the light trap or the first rear wall area 32 (which adjoins a second rear wall area 34).
  • Secondary radiation of the primary radiation emitted by the light-emitting diode and coupled into the light-guiding body generated or arising at the decoupling device of the light-guiding body 24 is reflected here on the reflection surface of the second rear wall area (in the direction of the light-guiding body) (see secondary LED beam path 48) and/or in a
  • the upper area of the light trap or the first rear wall area is reflected and/or scattered by a wall side 47 that is further away from the illuminant in the direction of the light exit surface A of the light guide body (illustrated by the beam path identified by reference number 46), so that it is not absorbed in the light trap with respect to the secondary radiation 48 but instead contributes advantageously to increasing the light intensity and light yield of the light module 10 .
  • FIGS. 2a and 2b 12 show representations of a front view of a rear wall device 16 and 18 of a light module 10 according to an embodiment of the invention (only the rear wall being shown).
  • a structured rear wall (with a beam trap) can be seen here, with a number of first and second rear wall areas being periodically or regularly lined up (see Figure 2a ) and are arranged like a chess board.
  • the (existing) rear wall be structured periodically so that a beam trap is created and external light is absorbed. This reduces or avoids the color desaturation of externally illuminated optical surfaces while at the same time fulfilling the desired lighting function in the best possible way.
  • the proposed configuration provides a scalable approach (area size of the rear wall) which is distinguished at the same time by low production costs and volume-capable manufacture.
  • FIG 6 shows a schematic cross-sectional representation of a light module 10 according to the invention according to a further embodiment, in particular with a structured rear wall for a planar 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 57 here 58 differs.
  • the first material differs from the second material in particular by a scattering property (in particular with regard to the ambient radiation, which is preferably light from the wavelength range of a daylight spectrum).
  • figure 7 shows a detailed view of a section from the in 6
  • Point 51 is a point on the first rear wall area 56 and point 52 is a point on the surface of the second rear wall area 57.
  • the material of the second rear wall area (at and around point 52) is here at a (comparatively) high level of scattering suitable and intended, while the material of the first back wall region is suitable and intended for (comparatively) little scattering of the incident ambient radiation 44 .
  • FIGS. 5a and 5b show a front view 59a and a night appearance 59b (which is shown in Figure 5a ) Vehicle lamp shown) of a vehicle lamp according to the invention according to a further embodiment. It can be seen that here (precisely) a first rear wall area and (precisely) a second rear wall area is provided, which form the rear wall to an optical fiber.
  • the front view 61 of a vehicle light or light module designed according to such an embodiment shows a grid-like pattern with areas of lower intensity 61a and higher light intensity 61b corresponding to the arrangement of the first and second rear wall areas.
  • a lattice-shaped area 62a of lower intensity with lattice-hole-shaped areas 62b of higher light intensity also result in the night appearance.
  • FIGS 8a, 8b, 9 and 10 illustrate an embodiment of a light module according to the invention or a structured rear wall for planar light guides according to a further embodiment, in which a multiplicity of first rear wall areas 66 (with in particular one material, such as a dark and in particular black-colored material with low scattering) and a multiplicity of second rear wall areas 67 are provided, which form a (here in particular grid-shaped) pattern (see Figures 8a, 8b ).
  • first rear wall areas 66 with in particular one material, such as a dark and in particular black-colored material with low scattering
  • second rear wall areas 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 rear wall for planar light guides according to a yet another embodiment in which, compared to that in FIGS Figures 8a, 8b and 9 illustrated embodiment, the backplane or the backplane means 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 areas 74 on its surface, while a preferably light-colored material (in particular white material) is arranged in recesses in this base body and correspondingly forms a large number of second rear wall areas 73 .
  • the Figures 14 and 15 each show three depictions of a taillight ( 14 ) or a blinker ( 15 ) with an implementation of a back wall with a different pattern in each case.
  • the uppermost figures 82, 88 represent a black/white pattern of the structured rear wall for a planar light guide
  • the respective middle figures 84, 90 each have an inverted pattern compared to the uppermost figures 82, 88, i.e. a white/black pattern the structured rear wall for the planar light guide and the lowermost representations 86 and 92 have a (purely) white rear wall.
  • the tail light and the indicator differ from each other in their light 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 light emitted (or transmitted from the LED) by the turn signal is orange or yellow.
  • a control unit 5 is suitable and intended for controlling the lighting devices 2 via signal and control lines S.
  • the reference number 2a denotes a part of the lighting device on the body side and the reference number 2b denotes a part of the lighting device 2 on the tailgate side.

Landscapes

  • 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)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
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 Pending EP4113001A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP21183052.6A EP4113001A1 (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

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21183052.6A EP4113001A1 (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

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Publication Number Publication Date
EP4113001A1 true EP4113001A1 (fr) 2023-01-04

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US (1) US11988355B2 (fr)
EP (1) EP4113001A1 (fr)
CN (1) CN115560263A (fr)

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KR20230036228A (ko) * 2021-09-07 2023-03-14 현대자동차주식회사 블랙 이미지 타입 히든 라이트 램프 및 차량
KR20230114988A (ko) * 2022-01-26 2023-08-02 현대자동차주식회사 다면 반사식 히든 라이팅 램프 및 차량

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JP2007123175A (ja) * 2005-10-31 2007-05-17 Koito Mfg Co Ltd 車両用標識灯の灯具ユニット
US20070195540A1 (en) * 2006-01-30 2007-08-23 Toyoda Gosei Co., Ltd. Vehicle lighting system
DE102006059980A1 (de) * 2006-12-19 2008-06-26 Daimler Ag Leuchteinheit für einen Kraftwagen
US20080291685A1 (en) * 2007-05-22 2008-11-27 Toyoda Gosei Co., Ltd. Vehicle-purpose lighting tool
EP2889530A1 (fr) * 2013-12-27 2015-07-01 LG Innotek Co., Ltd. Dispositif d'éclairage utilisant un faisceau en forme de ligne
US20210062993A1 (en) * 2018-02-19 2021-03-04 Marelli Automotive Lighting France Signaling Device for a Motor Vehicle
DE102018009248A1 (de) * 2018-11-21 2020-05-28 Daimler Ag Leuchte für ein Kraftfahrzeug
DE102020118661A1 (de) * 2019-07-16 2021-03-04 Hella Autotechnik Nova, S.R.O. Signallampe mit 3d-lichteffekt

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US11988355B2 (en) 2024-05-21
CN115560263A (zh) 2023-01-03
US20230003360A1 (en) 2023-01-05

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