EP3803196A1 - Module d'éclairage pour phare de véhicule automobile - Google Patents

Module d'éclairage pour phare de véhicule automobile

Info

Publication number
EP3803196A1
EP3803196A1 EP19724192.0A EP19724192A EP3803196A1 EP 3803196 A1 EP3803196 A1 EP 3803196A1 EP 19724192 A EP19724192 A EP 19724192A EP 3803196 A1 EP3803196 A1 EP 3803196A1
Authority
EP
European Patent Office
Prior art keywords
light
light source
optics
additional
micro
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19724192.0A
Other languages
German (de)
English (en)
Other versions
EP3803196B1 (fr
Inventor
Matthias Kemetmüller
Bernhard Mandl
Andreas Moser
Friedrich Bauer
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.)
ZKW Group GmbH
Original Assignee
ZKW Group GmbH
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 ZKW Group GmbH filed Critical ZKW Group GmbH
Publication of EP3803196A1 publication Critical patent/EP3803196A1/fr
Application granted granted Critical
Publication of EP3803196B1 publication Critical patent/EP3803196B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • 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]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • 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]
    • 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]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • 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
    • F21S41/19—Attachment of light sources or lamp holders
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/47—Attachment 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • 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 invention relates to a light module for a motor vehicle headlight for
  • Projection device wherein the projection device has an inlet optics and exit optics, wherein the entrance optics is set up, an intermediate image of light emitted from the at least one light source in a lying between the entrance optics and the exit optics, substantially transversely to an optical axis of the projection device intermediate image plane form, and the exit optics is arranged to image the intermediate image in Porm a light distribution of a first predetermined type in an area in front of the light module.
  • the invention relates to a motor vehicle headlight with at least one such light module.
  • the projection device comprises: an entrance optics, which consists of an array of micro-entry optics; an exit optics which consists of an array of micro exit optics, wherein each micro entrance optics is assigned exactly one micro exit optics, wherein the micro entrance optics are configured and / or the micro entrance optics and the micro exit optics are arranged in such a way that the light emerging from a micro-entry optic exactly enters only the associated micro-exit optics, and wherein the light preformed by the micro-entry optics is imaged by the micro exit optics in an area in front of the motor vehicle as at least one light distribution.
  • Microprojection light module for a Pahrzeugscheinwerfer thematized which comprises at least one light source and at least one projection device, which the light emerging from the at least one light source into an area in front of
  • Vehicle in the form of at least one light distribution maps
  • Projection means an entrance optics having one, two or more micro-entrance optics, which are preferably arranged in an array, and an exit optics having one, two or more micro-exit optics, which are preferably arranged in an array, wherein each micro Entry optics is assigned exactly a micro-exit optics, wherein the micro-entry optics formed and / or the micro-entry optics and the micro-exit optics are arranged to each other such that substantially all of the light emerging from a micro-entry optics light just in the associated Micro-exit optics occurs, and wherein the light preformed by the micro-entry optics of the micro-exit optics in an area in front of the motor vehicle is imaged as at least one light distribution.
  • the international application WO 2017/066818 A1 of the applicant shows a microprojection light module for a motor vehicle headlight, comprising at least one light source and at least one projection device, which projects the light emerging from the at least one light source into an area in front of the motor vehicle in the form of at least one light distribution
  • the projection device comprises an entrance optics, which has one, two or more micro entrance optics, which are preferably arranged in an array, an exit optics, which has one, two or more micro exit optics, which are preferably arranged in an array, wherein each micro-entry optics is arranged to exactly one micro-exit optics, wherein the micro-entry optics formed and / or the micro-entry optics and the micro-exit optics are arranged to each other such that substantially all of a micro-entry optics a Exactly enters the incoming light only in the associated micro-exit optics, and wherein the preformed by the micro-entry optics of the micro-exit optics in an area in front
  • a disadvantage of the above-mentioned light modules is that only a very limited number of light distributions can be generated with a single light module, and consequently light functions can be realized (low efficiency). Above all, it is disadvantageous that such
  • Light modules offer no possibility of the same light exit surface of the light module a secondary light function, such as direction indicator (static or dynamic, for example, as running light), position light and / or daytime running lights (static or as
  • Running light etc. and a main light function such as low beam, high beam, light functions of an adaptive front light system (light functions of an AFS headlamp) to realize.
  • a main light function such as low beam, high beam, light functions of an adaptive front light system (light functions of an AFS headlamp) to realize.
  • the object of the present invention is to improve the conventional light modules to the effect, or to expand their structure so that from the light exit surface of the same light module several light functions, preferably can be generated simultaneously.
  • a light module of the type mentioned above in that at least one additional light source - so-called additional light source - is provided, which is arranged at least one additional light source to emit light between the entrance optics and the exit optics (in this area there the at least one additional light source emits light); the outlet optics is arranged, the light emitted by the at least one additional light source in the area in front of the light module in the form of a
  • the entrance optics and the at least one additional light source are designed and assigned to one another such that neither the at least one additional light source nor the light emitted by the at least one additional light source alters the intermediate image.
  • the light generated by the at least one additional light source does not influence the intermediate image produced with the light of the at least one light source.
  • the at least one additional light source generates in the intermediate image plane
  • the at least one light source is downstream of a collimator.
  • Prescribed type does not overlap the light distribution of the second predetermined type in the light image, although these emitted from the same light exit surface of the light module become.
  • Such light distributions can be used to realize different light functions.
  • the entrance optics and the at least one additional light source can be designed and assigned to one another in such a way that that of the at least one
  • Beam path through the optical projection device runs. It is expedient if the at least one additional light source is outside the first beam path - ie not in the first beam path - so that neither the at least one additional light source nor the light emitted by the at least one additional light source changes the intermediate image.
  • the at least one additional light source is set up to produce collimated light which is substantially parallel to the optical axis of the projection device. This has the advantage that with respect to a light image generated with the at least one additional light source, an exact position of the at least one additional light source between the entrance optics and the exit optics and in particular with respect to the intermediate image plane is not relevant, whereby the adjustment of the light module is easier. It may even be advantageous if the at least one additional light source is not arranged in the intermediate image plane.
  • micro-entry optics or micro exit optics - are formed, wherein each micro entrance optics at least one, preferably exactly one micro Egress optics corresponds such that they have a common, preferably horizontally extending, optical axis and form a micro-optical system.
  • the term "common optical axis of two optics” means that the optical axes of these two optics substantially coincide. Using very small optics at the light exit surface - micro-optics with characteristic sizes in the micrometer range - leads to a more uniform
  • the at least one additional light source has a plurality of spaced-apart Lichtabstrahl Schemee for emitting the light between the entrance optics and the exit optics, which Lichtabstrahl Schemee in a substantially transverse to the optical axis of the projection device level - in the so-called Lichtabstrahlebene - are arranged. It is understood that this plane is arranged between the entrance optics and the exit optics. Preferably, by means of each light emission region, a light beam is generated which propagates parallel to the optical axis of the projection device.
  • the at least one additional light source has a light guide element and a light source associated with the light guide element, preferably an LED light source, wherein the Lichtabstrahl Schemee are arranged in the light guide element. It may be advantageous if the light source is not between the entrance optics and the exit optics.
  • the luminous means and the at least one light source are arranged on a common light source carrier. For example, if the at least one light source and the lighting means are designed as LED light sources, these LED light sources can be arranged on a common printed circuit board (on the same print).
  • the light guide element is formed as a light guide plate arranged substantially transversely to the optical axis of the projection device, wherein the light guide plate at least one light input surface for coupling light of the light source, which light propagates in the light guide plate and to the
  • the light of the light source can be coupled laterally or from below or from above into the light guide plate. After coupling, the light spreads (due to
  • the light spreads in the area Light guide plate substantially transversely to the optical axis of the projection device until it is deflected in the Lichtabstrahl Schemeen and emerges in a direction substantially parallel to the optical axis direction of the light guide plate.
  • Lightguide plate is a plane, extending in a plane in two directions
  • the light extraction prisms are preferably configured to couple out the light from the light guide plate in a direction substantially parallel to the optical axis.
  • the light extraction prisms are perpendicular to
  • Propagation direction of the light in the light guide plate For example, the
  • Lichtauskoppelprismen an angle of about 40 °.
  • Feeding (injecting) from different sides into the light guide plate and matching the shape of the light extraction prisms may help to realize even more (more than two) different light functions.
  • the micro entrance optics array has a plurality of intermediate regions assigned to the light emission regions and preferably planar.
  • micro-optics of the micro-entrance optics array and / or the micro-exit optics array can be formed, for example, as convex lenses.
  • the intermediate regions of the micro-entrance optical array preferably have no micro-entry optics and are for example designed such that scattering is reduced by the light generated by means of the at least one light source. If the at least one light source generates parallel light or the light of the at least one light source is collimated, for example, by a collimator, it is more likely to encounter the entrance optics, it is particularly advantageous to form the intermediate regions in a planar manner. In this sense, the light penetrating into the projection device through these intermediate regions is irrelevant to the formation of the intermediate image and thus to the first light function. Preferably, this light can be shielded (see below).
  • Lichtabstrahlebene are distributed like a checkerboard and the intermediate areas in the micro-entry optics array are distributed like a checkerboard, wherein the Lichtabstrahl Schemee the intermediate areas (in the direction of the optical axis) are arranged downstream.
  • this arrangement seen in the direction of the optical axis of the optical projection device, preferably formed of squares,
  • Checkerboard pattern are arranged corresponding to the intermediate areas.
  • the intermediate regions are made opaque.
  • a shielding element may be provided with the intermediate regions of corresponding opaque shielding regions, which shielding element shields the intermediate regions from the light of the at least one light source.
  • the at least one additional light source is designed as a carrier for the entrance optics or the exit optics.
  • the at least one additional light source is designed as a carrier for the entrance optics or the exit optics.
  • Entry optics or exit optics which are for example as the micro-entry optics array or the micro exit optics array of silicone, arranged on the additional light source, for example, applied to them, in particular connected to this, for example glued. This is particularly advantageous with regard to the synergetic use of photometrically relevant components of a light module (for example, if the substrate plate is used as a light guide).
  • the inlet optics in particular the micro entrance optics array, are preferably arranged, for example applied, in particular glued, on a side of the at least one additional light source facing the at least one first light source.
  • the variety of light functions that can be realized with the light module according to the invention can be further increased if two additional light sources are provided, wherein a first of the two additional light sources carries the entrance optics and a second of the two additional light sources carries the exit optics.
  • the exit optics in particular the micro exit optics array, are preferably arranged, for example applied, in particular glued, on a side of the second additional light source facing away from the at least one first light source.
  • the light emission regions of the first additional light source and the light emission regions of the second additional light source are designed and positioned relative to one another such that light rays generated by the corresponding light emission regions propagate in different, non-overlapping regions of the projection device.
  • the light emission regions of the at least one or all additional light sources can be placed in the unimportant regions emitted by the at least one light source, which emits, for example, light for the main light function. This will not affect the main light function.
  • the projection device has at least one diaphragm device which lies between the inlet optics and the outlet optics and which at least one diaphragm device corresponds to the intermediate regions
  • a first diaphragm element can be provided, which first diaphragm element is disposed in front of the light emission regions and shields the light emission regions from the light of the at least one light source.
  • the first diaphragm element is set up to form the intermediate image from the light emitted by the at least one light source, for example for a low-beam light distribution.
  • the Lichtabstrahl Schemee in the Lichtabstralandere the at least one additional light source has a shape horizontally, transversely to the optical axis of the optical projection device extending vertically from each other, preferably equidistant spaced strips and the panel element has these strips corresponding opaque areas.
  • the aperture element can be arranged, for example, on the light exit side with respect to the entrance optics and in front of the light guide plate, for example on a light exit surface of the entrance optics or on a side of the light guide plate facing the at least one light source, in particular on the light exit surface of the entrance optics or on the side of the light guide plate facing the at least one light source be upset.
  • the at least one additional light source is designed as a carrier for at least the first diaphragm element.
  • the first panel element is arranged on the at least one additional light source, for example applied to it, in particular printed on this.
  • the first diaphragm element is arranged on one of the at least one light source side facing the at least one additional light source, for example applied, in particular glued.
  • first additional light source carries at least the first diaphragm element
  • second additional light source carries the exit optics and the first diaphragm element
  • the exit optics in particular the micro exit optics array, are preferably arranged, for example applied, in particular glued, on a side of the second additional light source facing away from the at least one light source.
  • the light emission regions of the first additional light source and the light emission regions of the second additional light source are designed and positioned relative to one another in such a way that they differ from the corresponding ones
  • a second diaphragm element may be provided, which second
  • Aperture element is the light emission areas of the second additional light source upstream and arranged to shield the second additional light source and / or limit of the first additional light source emitted light.
  • the first additional light source is designed as a carrier for the second diaphragm element.
  • the second diaphragm element is arranged on the first additional light source, for example applied to it, in particular printed on this.
  • the second diaphragm element is arranged on one of the at least one light source side facing away from the first additional light source, for example applied, in particular glued.
  • Light distribution of the second predetermined type is independent.
  • the light distribution of the second type can be generated independently of whether the light distribution of the first type is being generated or not.
  • daytime running lights can be on - be generated with the light generated by means of at least one additional light source, without causing a Abblertztvertechnik is radiated - the at least one light source is off.
  • the first predetermined type of light distribution may be a main light function light distribution, for example low beam light distribution or
  • the second predetermined type of light distribution may be a secondary light function light distribution, for example a direction indicator light distribution, position light light distribution, daytime light light distribution, signal light distribution.
  • At least one main and at least one secondary Light function for example, be realized simultaneously or corresponding light distributions are generated simultaneously.
  • the light distributions of the first and second types may overlap each other (when both are generated). However, it may also be advantageous if the light distribution of the second type does not overlap the light distribution of the first type in the light image (e.g.
  • the present invention can bring one or more of the following advantages: multiple light functions from the same light exit surface possible; less installation space than with separate version (several independent light modules) necessary; Homogeneous appearance in the illuminated / unlit state; Light emission areas are imaged by lens optics, which allows a better design of the light distribution and thus light utilization.
  • a main light function light distribution such as a low beam distribution or high beam distribution, such as an adaptive
  • High beam distribution is and the light distribution of a second predetermined type, a secondary light distribution, such as
  • FIG. 1 shows a motor vehicle light module according to a first embodiment in perspective view.
  • Fig. La a part of the motor vehicle light module of Fig. 1;
  • FIG. 2 shows a motor vehicle light module according to a second embodiment in FIG.
  • FIG. 3 shows a shielding element for a motor vehicle light module of FIG. 1;
  • FIG. 4 shows an aperture device for a motor vehicle light module of FIG. 1;
  • FIG. 5 and FIG. 6 a first diaphragm element of the motor vehicle light module of FIG. 2;
  • FIG. 7 to 9 are sectional views of an enlarged part of a projection device of a motor vehicle light module according to a first embodiment with an additional light source;
  • FIGS. 10 and 11 are sectional views of an enlarged part of a projection device of a motor vehicle light module according to a first embodiment with two additional light sources;
  • FIG. 12 and FIG. 13 are sectional views of an enlarged part of a projection device of a motor vehicle light module according to a second embodiment with an additional light source, and
  • FIG. 14 and FIG. 15 are sectional views of an enlarged part of a projection device of a motor vehicle light module according to a second embodiment with two additional light sources.
  • each figure is provided with a coordinate system. Three directions are indicated: horizontal H and vertical V direction and a main emission direction Z of the motor vehicle light module.
  • the terms “above”, “below”, “vertical”, “horizontal” etc. refer to a professional installation position of the motor vehicle light module in a motor vehicle.
  • the main emission direction Z corresponds to the forward movement direction of the motor vehicle when the motor vehicle light module is arranged in a motor vehicle headlight for generating at least one main light distribution.
  • Figures 1, la and 2 each show a schematic representation of a motor vehicle light module (or a part of the
  • Motor vehicle light module for a headlight, in particular a motor vehicle headlight, which may correspond to a light module according to the invention.
  • Motor vehicle light module is particularly well suited for motor vehicle headlights, in which a compact design is in the foreground and from a single and preferably continuous light exit surface several light functions (for example, a main and at least one secondary light function) should preferably be realized simultaneously.
  • this light exit surface corresponds to a light exit surface of an exit optics 22
  • the motor vehicle light module has at least one light source 1, for example an LED light source.
  • the at least one light source 1 is preceded by a collimator 9.
  • the projection device 2 also has an entrance optics 21.
  • the entry optics 21 and the exit optics 22 are arranged, an intermediate image of light emitted by the at least one light source 1, preferably collimated by the collimator 9 in a light lying between the entrance optics 21 and the exit optics 22, substantially transverse to an optical axis of the projection device 2 standing intermediate image plane to form.
  • the exit optics 22 is set up to image the intermediate image in the form of a light distribution of a first predetermined type into an area in front of the motor vehicle light module.
  • the first type of light distribution can be, for example, a main light function light distribution - that is to say a light distribution which is generated when the main light function of the motor vehicle light module is activated.
  • a main light function light distribution may be a low beam distribution or (for example, adaptive or glare-free) high beam distribution.
  • at least one additional light source - so-called additional light source 3a, 3c - is provided, which at least one second additional light source 3a, 3c is arranged to emit light between the entrance optics 21 and the exit optics 22.
  • the at least one additional light source 3a, 3c is preferably not a point light source. It is advantageous if the at least one additional light source 3a, 3c extends spatially and occupies a predetermined area between the entrance optics 21 and the exit optics of the projection device. In this case, as can be seen from the examples described below, the at least one additional light source 3a, 3b, 3c, 3d (see also FIGS. 7 to 15) can comprise a luminous means 32 which is outside the region between the entrance optics 21 and the exit optics 22 is located.
  • the light emitted by the at least one additional light source 3a, 3b is imaged by means of the exit optics 22 in the (same) area in front of the light module in the form of a light distribution of a second predetermined type.
  • the second type of light distribution is a secondary light function light distribution - ie a light distribution which is generated when the secondary light function of the motor vehicle light module is actuated.
  • logos, welcome light functions can be realized.
  • the entrance optics 21 and the at least one additional light source 3a, 3c are formed and assigned to one another such that neither the at least one additional light source 3a, 3c nor the light emitted by the at least one additional light source 3a, 3c illuminates the intermediate image changes.
  • the light generated by the at least one additional light source 3a, 3b, 3c, 3d leaves the intermediate image generated with the light of the at least one light source 1 unaffected / unimpaired / unchanged.
  • the at least one additional light source 3a, 3c generates in the intermediate image plane an additional / second intermediate image which does not overlap the (original) intermediate image.
  • the light generated by the at least one light source 1 propagates according to (or along) a first beam path 100 and the light generated by the at least one additional light source 3a, 3b, 3c, 3d according to a second, different beam path 300a, 300b, 300c , 300d through the optical projection device 2 (see in particular FIGS. 7 to 15). It is expedient if the at least one additional light source 3a, 3b, 3c, 3d outside of the first beam path 100 - that is not in the first beam path - is.
  • the at least one additional light source 3a, 3b, 3c, 3d is set up to produce collimated light, which is substantially parallel to the optical axis of the projection device 2.
  • 3c, 3d are not relevant between the entrance optics 21 and the exit optics 22 and in particular with regard to the intermediate image plane. Nevertheless, it is conceivable to place the at least one additional light source 3a, 3b, 3c, 3d in the intermediate image plane.
  • the entrance optics 21 and the exit optics 22 are arranged as matrix-like arrays of micro entrance optics 210 or micro exit optics 220 - micro entrance optics array or micro exit optics - arranged in planes perpendicular to the optical axis of the optical projection device 2.
  • Array - are formed, each micro-entry optics 210 at least one, preferably exactly one micro exit optics 220 corresponds such that they have a common, preferably horizontally extending, optical axis and form a micro-optical system.
  • the micro-input / output optics 210, 220 may be formed, for example, as convex lenses.
  • the direction of the optical axis of each micro-optics system preferably coincides with the main emission direction Z.
  • common optical axis of two optics means that the optical axes of these two optics substantially coincide.
  • the at least one additional light source 3a, 3b, 3c, 3d may have a plurality of spaced-apart light emission regions 30a, 30b, 30c, 30d for emitting the light between the entrance optics 21 and the exit optics 22 (see in particular FIGS 9 to 15), which Lichtabstrahl Schemee 30a, 30b, 30c, 30d in a plane substantially transverse to the optical axis of the projection device 2 - in the so-called Lichtabstrahlebene - are arranged.
  • this plane is arranged between the entrance optics 21 and the exit optics 22.
  • Light beam 300a, 300b, 300c, 300d generated, which propagates parallel to the optical axis of the projection device 2.
  • the Lichtabstrahl Schemee 30a, 30b, 30c, 30d of the exit optics 22 are assigned. It is particularly advantageous if each light emission area of a region of the exit optics 22, for example one - if the exit optics is designed as a micro exit optics array - is associated with individual micro exit optics 210 or a horizontal row of the micro exit optics.
  • the decoupling element is located on the rear side of the luminous element (with respect to the emission direction Z). That by the
  • Decoupling element deflected light exits at the opposite side by a curved exit surface of the filament.
  • the abovementioned assignment of the light emission regions 30a, 30b, 30c, 30d of the exit optics 22 can serve, for example, for the curvature of the exit optics 22, for example their micro exit optics 210, to be shaped by the at least one additional light source 3a, 3b, 3c , 3d generated photo is used.
  • the light image can therefore be designed on the one hand via the size and / or shape of the Lichtabstrahl Schemee 30a, 30b, 30c, 30d of the at least one additional light source 3a, 3b, 3c, 3d and / or on the imaging properties of the exit optics 22, such as its thickness
  • the efficiency of the at least one additional light source 3a, 3b, 3c, 3d is increased.
  • the at least one additional light source 3a, 3c has a light guide element 31a, 31c and the already briefly mentioned light source 32, the light source 32 being associated with the light guide element 31a, 31c.
  • the lighting means 32 is preferably designed as an LED lighting means.
  • the Lichtabstrahl Schemee 30a, 30b, 30c, 30d (not visible in Figures 1 and 2) are preferably in the
  • Optical fiber element 31a, 31b, 31c, 31d arranged.
  • the luminous means 32 does not lie between the entrance optics 21 and the exit optics 22, as shown in FIGS. 1, 1a and 2.
  • the luminous means 32 can be designed as an LED illuminant. It is quite conceivable that both the LED light source 1 and the LED illuminant 32 are mounted on a common printed circuit board.
  • the LED light source 1 and the LED light source 32 each have a plurality of LEDs, wherein both the LEDs of the LED light source 1 and the LEDs of the LED light source 32 in one of the optical axis of the
  • Projection device 2 are arranged substantially perpendicular plane and preferably emit light in the direction of the optical axis.
  • the LED lighting means may have three LEDs arranged side by side (not shown) or one above the other (see FIG. 1a).
  • An arrangement of the LED illuminant from above / below makes it possible to have several projection devices 2 side by side in one
  • the optical waveguide element may be formed as a light guide plate 31a, 31b, 31c, 31d, which (in the region between the entrance optics 21 and the exit optics 22) is arranged substantially transversely to the optical axis of the projection device 2.
  • microprojection light modules in which micro entrance optics array and micro exit optics array are each applied to a substrate plate, for example a glass plate, in particular are glued.
  • the substrate plates are often present because the micro-entry optics or micro-exit optics of the microprojection light modules can already be arranged during production on such a glass carrier / substrate plate.
  • optical properties, such as focal length, of the lenses (micro-optics) be specified. If a certain focal length is desired, it can
  • micro entrance optics, micro exit optics may be made of polycarbonate (PC) and placed on a substrate plate of crown glass (eg B270® glass), for example glued, for example, light guide element may be polycarbonate
  • PC polycarbonate
  • crown glass eg B270® glass
  • light guide element may be polycarbonate
  • This also determines the thickness, that is to say the extent in the direction of an optical axis, of the entire projection device 15.
  • Substrate plates for the micro entrance optics array or micro exit optics array can be of different thicknesses This has the same reason:
  • the thickness of the projection device is practically predetermined by the fixed dimensions of the lenses in the micro entrance optics array or micro exit optics array
  • one or more diaphragm (s) can be provided, which likewise rest on a substrate plate - so-called
  • Shuttering substrate (shutter - borrowed from the English for aperture) - is applied (become).
  • the thickness of the projection device can be reduced in the manufacturing process such that the shutter substrate can be inserted.
  • one or more of the light guide plates 31a, 31b, 31c, 31d are formed as a substrate plate of the micro entrance optics array and / or the micro exit optics array or as a shutter substrate.
  • the light guide plate 31a, 31b, 31c, 31d has at least one, preferably laterally or below or above the light guide plate 31a, 31b, 31c, 31d arranged Lichteinkoppel constitutional 310a, 310c for coupling light 320a, 320c of the bulb 32, which light in the light guide plate propagates and exits at the light emitting portions 30a, 30b, 30c, 30d from the light guide plate.
  • Lichteinkoppel reaction 310a, 310c for coupling light 320a, 320c of the bulb 32, which light in the light guide plate propagates and exits at the light emitting portions 30a, 30b, 30c, 30d from the light guide plate.
  • Pigures 1 and 2 show light guide plates which are planar in the region between the entrance optics 21 and the exit optics 22 and have a bent region 330a, 330c outside this region.
  • the light guide plates 31a, 31c shown are preferably bent towards their light coupling surfaces 310a, 310c.
  • the abovementioned arrangement of the at least one light source 1 and of the luminous means 32 is made possible in a common plane which is essentially perpendicular to the optical axis.
  • the light 320a, 320c emitted by the respective luminous means 32 parallel to the optical axis of the projection device 2 is transmitted via the respective one Illuminant 32 coupled light input surface 310a, 310c coupled into the light guide plate 31a, 31c, propagates due to the total reflection through the bent portion 330a, 330c in the lying between the entrance optics 21 and the exit optics 22 area of the light guide plate 31a, 31c and is at the Lichtabstrahl Suiteen 30a, 30b, 30c, 30d are coupled out substantially parallel to the optical axis of the projection device 2.
  • Lightguide plate in the region in which light is coupled out of the light guide plate, flat trained, extending in a plane in two directions
  • each light emission region 30a, 30b, 30c, 30d has a plurality of light extraction prisms.
  • prisms with an angle of incidence of approximately 40 °, which decouple the light in parallel, have proven to be practicable.
  • the angle of attack can also be varied, so that a uniform light extraction takes place.
  • Light extraction prisms are set up, the light from the light guide plate 31a, 31b, 31c,
  • the light extraction prisms are preferably perpendicular to the propagation direction of the light in the light guide plate.
  • Embodiments turned out to be particularly useful.
  • the entrance optics 21 and the exit optics 22 are each referred to as micro entrance optics.
  • the intermediate regions 211 of the micro entrance optics array are characterized in that they have no micro entrance optics - in this case no convex lens. In this Meaning, the light penetrating into the projection device through these intermediate regions 211 is irrelevant to the formation of the intermediate image and thus irrelevant to the first light function.
  • the Lichtabstrahl Schemee 30a, 30b are in the Lichtabstraussie preferably (see Figure la) distributed like a checkerboard.
  • the intermediate regions 211 are likewise distributed in a checkerboard pattern in the micro entrance optics array, the light emission regions 30a, 30b being arranged downstream of the intermediate regions 211 (viewed in the direction of the optical axis of the projection device 2). That is, for example, that a light emitting area 30a, 30b is placed behind (as seen in the direction of the optical axis of the projector 2) each intermediate area 211 of the micro entrance optical array (see, for example, Figs.
  • the intermediate regions 211 are made opaque or a shielding element 23 is provided with the opaque shielding regions 230 corresponding to the intermediate regions 211 (see FIG. 3).
  • Shielding element 23 serves, for example, to shield the intermediate regions 211 from the light of the at least one light source 1.
  • Light source 1 does not impinge on the Lichtabstrahl Schemee 30, is not scattered at this. This leads to the reduction of unwanted scattered light.
  • the shielding element 23 is preferably arranged in a plane orthogonal to the optical axis of the optical projection device 2 and preferably extends over substantially the entire light entry surface of the entrance optics 21.
  • the shielding element 23 is arranged on the light entry side with respect to the entrance optics 21, for example at a light entry surface of the entrance optics 21, in particular on the light entry surface of the entrance optics 21 is applied, and preferably the light generated by the at least one light source 1 on the micro light.
  • entry optics 210 can not come up with the intermediate regions 211 of the micro entrance optics array.
  • the shielding element 23 can be embodied as a planar diaphragm having a plurality of light-impermeable shielding regions 230
  • the shielding element 23 is formed as a continuous layer, wherein this layer has regions of different light transmittance / transparency. It is also conceivable that the
  • Translucency / transparency of these areas in a controlled manner such as in a liquid crystal display, changeable.
  • the at least one additional light source 3a as a
  • Support / carrier element for the entrance optics 21 act ( Figures 1 and 7 to 9).
  • the entrance optics 21 is arranged on one of the at least one first light source 1 facing side of the at least one additional light source 3a, for example applied, in particular glued.
  • the at least one additional light source 3a can function as a carrier / carrier element for the exit optics 22 (FIG. 10).
  • the exit optics 22 on one of the at least one first light source 1 opposite side of the at least one additional light source 3a is arranged, for example applied, in particular glued.
  • the light emission regions 30a of the first additional light source 3a and the light emission regions 30b of the second auxiliary light source 3b prefferably be configured and positioned relative to one another in such a way that light rays 300a, 300b generated by the corresponding light emission regions 30a, 30b are in different directions spread out non-overlapping areas of the projection device 2.
  • FIGS. 7 to 11 show, in particular, that the light emission regions 30a and 30b can emit collimated light parallel to the optical axis of the projection device.
  • the light emitting areas 30a and 30b are sized and positioned such that light beams 300a radiated from first light emitting areas 30a are parallel to, for example, above (FIG. 10), light beams 300b, second
  • Lichtabstrahl Symposiumen be emitted 30b. If the first light emission regions 30a are positioned below an optical axis of a corresponding micro exit optics 220, the rays 300a on this micro exit optics 220 are refracted and imaged in an area above the horizon (HH line). Be the second
  • light emission regions 30b are positioned below an optical axis of a corresponding micro exit optics 220, the rays 300b on this micro exit optics 220 are refracted and imaged into an area below the horizon.
  • a first additional light source 3a a light distribution emitted above the horizon can be generated-for example, a signal light distribution and with a second additional light source 3b a below the horizon
  • Light distribution - be implemented, for example, a daytime running or direction indicator light distribution.
  • the projection device 2 at least one between the
  • the diaphragm device 7, 8 may be configured to form the intermediate image, for example a
  • the diaphragm device 7, 8 may comprise a plurality of diaphragms.
  • FIG. 4 shows a diaphragm device 7 for generating a diaphragm
  • a first diaphragm element 4, 5 is provided, which first diaphragm element 4, 5 den
  • respective opaque areas 40, 50 are provided in the first panel member 4, 5 for shielding the light emitting areas 30c, 30d.
  • the at least one additional light source 3c preferably carries the first diaphragm element 4, 5 (FIG. 2). Furthermore, it may be appropriate if the first
  • the light guide plate can simultaneously represent the holder for the microlens array (micro entrance optics array and / or micro exit optics array). This simplifies the system, because in this case the light guide plate can replace the substrate plate for micro entrance optics or micro exit optics, whereby insertion loss of the projection device is reduced but also required space is smaller.
  • the at least one additional light source 3c carries the function of such a carrier.
  • the Lichtabstrahl Schemee 30c, 30d in the Lichtabstralandere the at least one additional light source 3c, 3d for example, a shape horizontally, transversely to the optical axis of the optical projection device 2 / to the main emission Z extending vertically (in the direction of V) from each other, preferably equidistantly spaced Have stripes.
  • the diaphragm element 4, 5 it is expedient for the diaphragm element 4, 5 to have corresponding light-impermeable regions 40, 50 corresponding to these strips (see FIGS. 5 and 6).
  • the light emission regions 30c, 30d are preferably arranged directly (for example 0-5 mm) after, for example, on the first diaphragm element 4, 5.
  • the first diaphragm element 5 can be set up, from the light emitted by the at least one light source 1, the intermediate image for a
  • Such a diaphragm element may for example have a plurality of corresponding openings.
  • aperture element 4, 5 is applied on the light exit side with respect to the entrance optics 21 on the side of the light guide plate 31c, 31d facing the at least one light source 1.
  • a first additional light source 3c carries at least the first diaphragm element 4, 5
  • a second auxiliary light source 3d carries the exit optical system 22 (see FIGS. 14 and 15) and the first
  • Shutter element 4, 5 is the light emission areas 30c of the first additional light source 3c upstream.
  • the exit optics in particular the micro exit optics array on one of the at least one first light source 1 side facing away from the second additional light source 3d arranged, for example applied, in particular glued.
  • Lichtabstrahl Schemee 30c of the first additional light source 3c and the Lichtabstrahl Schemee 30d of the second auxiliary light source 3d are formed and positioned relative to each other so as to generate from the corresponding light emitting portions 30c, 30d
  • Light beams 300c, 300d in different, non-overlapping areas of the projection device 2 propagate.
  • a second diaphragm element 6 can be provided.
  • the second diaphragm element 6 can be provided.
  • the second diaphragm element 6 can be arranged in front of the light emission regions 30d of the second additional light source 3d. It is advantageous if the second diaphragm element is set up to shield the second additional light source 3d.
  • Shutter element 6, similar to the aperture device 7, 8 mentioned in relation to the first preferred embodiment, may be additionally configured to
  • the first diaphragm element 4, 5 and the second 6 may be formed as a planar diaphragm with a plurality of apertures.
  • FIGS. 12 to 15 are sectional views of an enlarged part of FIG.
  • the at least one accessory light source may replace the shutter substrate or micro exit optics array substrate plate - the micro exit optics array substrate plate.
  • the Lichtabstrahl Societye 30c and 30d collimated light 300c, 300d, preferably parallel to the optical axis of the Radiate projection device 2.
  • the light-emitting regions 30c and 30d are dimensioned and positioned such that radiated from first light-emitting regions 30c
  • the rays 300d are refracted at this micro exit optics 220 and into one Area shown below the horizon.
  • a light distribution emitted above the horizon can be generated - for example a signal light distribution and with a second additional light source 3d a light distribution lying below the horizon - for example a daytime light or direction indicator light distribution be realized.
  • the light emission regions 30c, 30d are arranged, preferably directly, on or behind the corresponding opaque region of the corresponding (first or second) diaphragm element 4, 5, 6.
  • the first additional light source 3c also carries the second diaphragm element 6.
  • the second aperture element 6 is on one of the at least one first
  • Light guide plate 31c, 31d arranged, for example applied, in particular glued.
  • a deployable light module for a motor vehicle headlight has other parts that have not been explicitly mentioned in connection with the present invention. These other parts are (exemplary but not exhaustive)
  • Heat sink support frame, mechanical and / or electrical actuators

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne un module d'éclairage destiné à phare de véhicule automobile et comprenant : au moins une source de lumière (1) et au moins un dispositif de projection (2). Le dispositif de projection (2) comporte une optique d'entrée (21) et une optique de sortie (22). L'optique d'entrée (21) est conçue pour former une image intermédiaire à partir de la lumière, émise par l'au moins une source de lumière (1), dans un plan d'image intermédiaire s'étendant sensiblement transversalement à un axe optique du dispositif de projection (2) et situé entre l'optique d'entrée (21) et l'optique de sortie (22) et l'optique de sortie (22) est conçue pour reproduire l'image intermédiaire sous la forme d'une distribution de lumière d'un premier type prédéterminé dans une région située devant le module d'éclairage. Au moins une source de lumière supplémentaire (3a, 3b, 3c, 3d) est prévue, laquelle au moins une source de lumière supplémentaire (3a, 3b, 3c, 3d) est conçue pour émettre de la lumière entre l'optique d'entrée (21) et l'optique de sortie (22) ; l'optique de sortie (22) est conçue pour reproduire la lumière, émise par l'au moins une source de lumière supplémentaire (3a, 3b, 3c, 3d), dans la région située devant le module d'éclairage sous la forme d'une distribution de lumière d'un deuxième type prédéterminé ; l'optique d'entrée (21) et l'au moins une source de lumière supplémentaire (3a, 3b, 3c, 3d) sont conçues et associées l'une à l'autre de manière à ce que ni l'au moins une source de lumière supplémentaire (3a, 3b, 3c, 3d) ni la lumière, émise par l'au moins une source de lumière supplémentaire (3a, 3b, 3c, 3d), ne modifient l'image intermédiaire.
EP19724192.0A 2018-05-25 2019-05-14 Module d'éclairage pour un phare de véhicule automobile Active EP3803196B1 (fr)

Applications Claiming Priority (2)

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EP18174282.6A EP3572719A1 (fr) 2018-05-25 2018-05-25 Module d'éclairage pour un phare de véhicule automobile
PCT/EP2019/062255 WO2019224041A1 (fr) 2018-05-25 2019-05-14 Module d'éclairage pour phare de véhicule automobile

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EP3803196A1 true EP3803196A1 (fr) 2021-04-14
EP3803196B1 EP3803196B1 (fr) 2023-03-29

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EP19724192.0A Active EP3803196B1 (fr) 2018-05-25 2019-05-14 Module d'éclairage pour un phare de véhicule automobile

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EP3803196B1 (fr) 2023-03-29
JP7004849B2 (ja) 2022-02-04
KR102410899B1 (ko) 2022-06-22
KR20200102467A (ko) 2020-08-31
CN112154288B (zh) 2023-02-24
WO2019224041A1 (fr) 2019-11-28
US20210108773A1 (en) 2021-04-15
JP2021521609A (ja) 2021-08-26
CN112154288A (zh) 2020-12-29
EP3572719A1 (fr) 2019-11-27
US11193643B2 (en) 2021-12-07

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