EP3205928B1 - Phare de véhicule automobile équipé d'un élément structurel à matrice à cristaux liquides - Google Patents

Phare de véhicule automobile équipé d'un élément structurel à matrice à cristaux liquides Download PDF

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Publication number
EP3205928B1
EP3205928B1 EP17154621.1A EP17154621A EP3205928B1 EP 3205928 B1 EP3205928 B1 EP 3205928B1 EP 17154621 A EP17154621 A EP 17154621A EP 3205928 B1 EP3205928 B1 EP 3205928B1
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EP
European Patent Office
Prior art keywords
light
beam path
optical element
headlight
liquid crystal
Prior art date
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Application number
EP17154621.1A
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German (de)
English (en)
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EP3205928A1 (fr
Inventor
Martin Licht
Joachim Knittel
Christian Buchberger
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.)
Marelli Automotive Lighting Reutlingen Germany GmbH
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Automotive Lighting Reutlingen GmbH
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Publication of EP3205928A1 publication Critical patent/EP3205928A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/689—Flaps, i.e. screens pivoting around one of their edges
    • 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
    • F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
    • F21S41/135—Polarised
    • 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
    • F21S41/30—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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • 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
    • F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
    • F21S41/64—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices
    • F21S41/645—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices by electro-optic means, e.g. liquid crystal or electrochromic devices

Definitions

  • the present invention relates to a motor vehicle headlight according to the preamble of claim 1.
  • Such a headlight is from the JP 2019 176981 A known.
  • liquid crystal matrix components are used as displays (LCD), but also in video projectors.
  • LCD liquid crystal matrix components
  • the prevailing environmental conditions such as strongly fluctuating temperatures, create obstacles to use that have to be overcome.
  • Another disadvantage is the rather weak contrast ratio between luminous and Matrix elements that are not set to glow.
  • the function of the liquid crystal matrix elements as segments of a light exit surface of the liquid crystal matrix component whose brightness can be controlled requires illumination with linearly polarized light.
  • Light from conventional light sources is initially not polarized and has two components of mutually orthogonal polarization directions.
  • the light is polarized before it strikes the liquid crystal matrix component.
  • the polarization is usually carried out by a polarization filter, which only allows one of the two components to pass through, and which absorbs or reflects the other component.
  • This document shows a polarizing beam splitter that splits the unpolarized light from a light source into two parts of different polarization.
  • the two parts illuminate different areas (matrix elements) of a liquid crystal matrix component, the transmission of which can be controlled separately.
  • a polarizing beam splitter is arranged between the light source and the liquid crystal matrix component in such a way that it splits the light incident from the light source into a matrix beam path and a basic beam path, the matrix beam path consists of light components of a first polarization direction and leads from the beam splitter to the liquid crystal matrix component and wherein the basic beam path consists of light components of a second polarization direction and, without touching the liquid crystal matrix component, leads to a first optical element which bundles the light incident in the base beam path.
  • the degree of reflection of the individual segments of the liquid crystal matrix component is individually adjustable and the rays of the matrix beam path are reflected on the liquid crystal matrix component according to the setting. After a reflection on the liquid crystal matrix component, the matrix beam path passes through the same beam splitter again.
  • both light components can contribute to the generation of a headlight distribution.
  • the second beam path leads to a first optical element without touching the liquid crystal matrix component, which bundles the light incident in the basic beam path, all the light losses are avoided in the basic beam path that would occur if this portion also had to pass through the liquid crystal matrix component or if it were reflected on the liquid crystal matrix component would have to be.
  • the invention allows the efficient generation of a headlight light distribution.
  • a rule-compliant basic light distribution or Generated low beam distribution is characterized in particular by the fact that it does not produce any inadmissible glare.
  • the headlight is used as intended while driving, this light is used in particular to efficiently illuminate an area of the area in front of the motor vehicle that is below the horizon.
  • the second beam path could also be used to generate a low beam distribution or a high beam basic light distribution, as shown in FIG DE 10 2008 036 193 occurs.
  • a further light distribution that supplements this basic light distribution or low beam distribution to form an overall light distribution can be generated in front of the vehicle.
  • the brightness pattern of the further light distribution can be set with a fineness determined by the number of matrix elements of the liquid crystal matrix.
  • the further light distribution is also referred to below as the pixel light distribution. In front of the vehicle, it is predominantly above the horizon. Glare of other road users who are in the area illuminated with this further light distribution can be avoided or at least reduced by darkening the segment of the liquid matrix component that illuminates this road user.
  • the headlight has a projection lens which is set up and arranged to collect light of the light source emanating from the liquid crystal matrix component and to direct it into the area in front of the headlight.
  • a preferred embodiment is characterized in that the first optical element is in the basic beam path Propagating light (low beam) is focused into an intermediate image surface that lies in the basic beam path between the first optical element and the projection lens, a distance between the intermediate image surface and the projection lens of the inter-image-side focal length (distance of the focal point from the apex of the lens surface facing the focal point) corresponds to the projection lens.
  • the intermediate image surface can be a flat or a curved surface.
  • Another preferred embodiment is characterized by a mirror diaphragm which has a diaphragm edge and which is arranged in the basic beam path (low beam) between the first optical element and the projection lens so that the diaphragm edge is at a distance from the projection lens that is the inter-image-side focal distance of the projection lens corresponds, and which mirror diaphragm extends from the diaphragm edge in a direction pointing from the projection lens to the diaphragm edge.
  • a mirror diaphragm which has a diaphragm edge and which is arranged in the basic beam path (low beam) between the first optical element and the projection lens so that the diaphragm edge is at a distance from the projection lens that is the inter-image-side focal distance of the projection lens corresponds, and which mirror diaphragm extends from the diaphragm edge in a direction pointing from the projection lens to the diaphragm edge.
  • the diaphragm edge is mapped as a sharp light-dark boundary.
  • the diaphragm is implemented as a mirror diaphragm with the arrangement mentioned, a high level of efficiency is achieved because there is no light to be shaded for the generation of the dark area of the light distribution is lost, but contributes to the illumination of the bright area through the reflection.
  • the mirror diaphragm extends parallel to an optical axis of the projection lens.
  • Another preferred embodiment is characterized by a focusing third optical element which is arranged in the matrix beam path (pixel light) between the beam splitter and the intermediate image surface in such a way that it focuses light propagating in the matrix beam path into the intermediate image surface.
  • a third optical element is arranged between the light source and the beam splitter and parallelizes the light emanating from the light source before it hits the beam splitter.
  • a fourth optical element is arranged in the basic beam path (low beam) between the beam splitter and the first optical element in such a way that it focuses light incident from the beam splitter into a focal area of the first optical element, and that light emanating from the focal area is the Light source illuminates the first optical element.
  • the light of the light source for illuminating the liquid crystal matrix component is first made parallel by the third optical element, it can be difficult to generate a low-beam light distribution through an image made with the first optical element.
  • the light that has passed through the polarizing beam splitter can be used with the fourth optical element be refocused.
  • the focal region facing the first optical element can then serve as a light source, from the light of which the first optical element generates a low beam distribution.
  • a first diaphragm is located between the beam splitter and the first optical element and protrudes into the basic beam path.
  • the screen edge of this screen is mapped into the apron as a light-dark border.
  • This screen can be connected in one piece to the mirror screen on the side facing away from the edge. However, it is preferably not reflective.
  • the diaphragm is located between the fourth optical element and the first optical element and protrudes into the basic beam path. If a projection lens is not available, the diaphragm edge of this diaphragm is imaged into the area in front of the area by the first optical element as a light-dark boundary.
  • the first diaphragm can be moved between a first position in which it does not protrude into the basic beam path and a second position in which it protrudes into the basic beam path.
  • the basic light or low beam distribution can be generated both with and without an image of the diaphragm edge as a sharp light-dark boundary.
  • the polarizer is a thin-film polarizer.
  • the polarizer has the basic shape a beam splitter cube which has a light entry surface facing the light source, a first light exit surface facing the liquid crystal matrix component, a second light exit surface facing the first optical element and a third light exit surface facing the projection lens, the light entry surface being curved so that it is incident from the light source Light is parallelized, and the second light exit surface is curved in such a way that it focuses the exiting light in a focal area located between the second light exit surface and the first optical element, and the third light exit surface is curved so that it focuses exiting light into the intermediate image area.
  • a first light exit surface faces the liquid crystal matrix component.
  • the cover plate has a first area which is arranged so that it is preferably illuminated by light propagating in the matrix beam path and which has a shape and / or coating there in which the degree of reflection for the first The direction of polarization becomes minimal, and that the cover plate has a second area which is arranged such that it is preferably illuminated by light propagating in the basic beam path and which has a shape and / or coating there in which the degree of reflection for the second direction of polarization is minimal. With minimal reflection, the transmission is maximal, which is favorable for a desired high efficiency.
  • a depolarizer which polarized the incident, is arranged in the matrix beam path in the light path after the liquid crystal matrix component Light is converted into unpolarized light, and a depolarizer is arranged in the basic beam path (low beam) in the light path after the beam splitter, which converts the incident polarized light into unpolarized light. This avoids undesirable reflection effects on a reflective road surface and poor visibility for wearers of glasses with polarization filters.
  • FIG. 1 a first embodiment of a headlight according to the invention of a motor vehicle.
  • the headlight 10 has a housing 12, the light exit opening of which is covered by a transparent cover plate 14.
  • a light source 1 Inside the housing 12 there is a light source 1, a first optical element 5, a beam splitter 3, a liquid crystal matrix component 4, optionally a second optical element 6, a third optical element 2, a projection lens 7 and a control device 8.
  • the control device 20 is set up, in particular programmed, to control the light source 1 and the properties of the liquid crystal matrix component 4 as a function of signals from a driver request generator 18 or a higher-level light control device of the motor vehicle.
  • the light source 1 preferably has at least one, but preferably several light-emitting diodes or laser diodes.
  • the third optical element 2 is located in the bundle of light emanating from the light source 1 and is preferably a lens, a microlens or a catadioptric lens Auxiliary optics realized.
  • the beam splitter 3 is shown here schematically as a beam splitter cube, which consists of two prismatic halves which in the plane of the drawing each have the shape of a right-angled and equilateral triangle and which are combined to form a cube along their base surfaces opposite the respective right angle. Deviating from this schematic representation, which allows a clear representation of the beam paths, the beam splitter is preferably a thin-film polarizer.
  • the beam splitter 3 has a light entry face 3.1 facing the third optical element 2, a first light entry and exit face 3.2 facing the liquid crystal matrix component 4, a second light exit face 3.3 facing the first optical element 5 and a third light exit face 3.4 facing the projection lens 7.
  • An intermediate image surface 9 lies between the optional second optical element 6 and a light entry surface of the projection lens 7.
  • the Figure 2 shows various elements from the Figure 1 together with a matrix beam path 22.
  • the third optical element 2 parallelizes light emanating from the light source 1. This light is not polarized.
  • the parallelized light enters the beam splitter 3 via the light entry surface of the beam splitter 3 facing the light source and is split into a matrix beam path 22 and a basic beam path 24 inside the beam splitter 3.
  • the second beam path 24 is in the Figure 3 shown.
  • the light component propagating in the matrix beam path 22 is linearly polarized in a first direction.
  • the light component propagating in the basic beam path 24 is in a second direction linearly polarized.
  • the splitting takes place in that the first portion is reflected to the side at the interface 3.0 of the beam splitter 3 between the two prisms, while the second portion passes through the interface 3.0 essentially without changing direction.
  • the light component propagating in the matrix beam path 22 emerges from the beam splitter 3 via the first light exit surface 3.2, which faces the liquid crystal matrix component 4 and illuminates the liquid crystal matrix component 4, which is divided into segments (matrix elements).
  • the degree of reflection of each segment can be set by the control unit 20. This is possible, for example, with an LCoS (Liquid Crystal on Silicon) component.
  • a conventional LCoS component only rotates the polarization in a pixel. The light with the rotated polarization is then no longer reflected on the beam splitter surface 3.0. Unrotated portions are reflected back on the beam splitter surface 3.0 in the direction of the light source 1.
  • Each segment whose optical properties can be individually controlled as a matrix element of the liquid crystal matrix thus represents a pixel on the light exit surface of the liquid crystal matrix component 4.
  • the first internal light distribution resulting from the sum of all pixels on the light exit surface of the liquid crystal matrix component is when the optional second optical element 6 is present is mapped as an intermediate image in the intermediate image area 9.
  • the resulting intermediate image since it is still in the housing, also represents an internal light distribution.
  • This second internal light distribution is projected by the projection lens 7 into an illumination zone located in front of the headlight 10.
  • a high beam portion of a total light distribution of the headlight 10 is generated.
  • Individual segments of the high beam component can be controlled in their brightness by controlling the brightness (or the polarization) of the assigned matrix element of the liquid crystal matrix component. This proportion of the total light distribution is therefore also referred to as the pixel light distribution.
  • depolarizer 13 which is arranged in one or both beam paths 22, 24 and which converts the incident polarized light into unpolarized light.
  • the depolarizer 13 can be, for example, a polarization mixer plate or a quarter-wave phase plate.
  • the Figure 3 shows elements of the subject of the Figures 1 and 2 with the basic beam path 24.
  • This part is also linearly polarized. It has a polarization that is orthogonal to the polarization of the first component.
  • the second portion emerges from the beam splitter 3 via the second light exit surface 3.3 of the beam splitter 3, which faces the first optical element 5, and is deflected by the first optical element 5, which is a reflector here, so that it passes through the projection lens 7 passes and is distributed in front of the headlight in the form of a basic light distribution or low beam distribution.
  • the second beam path 24 is characterized in that it leads, without touching the liquid crystal matrix component 4, to the first optical element 5, which directs the light incident in the basic beam path 24 onto the projection lens 7.
  • the Figure 4 shows the basic beam path 24 for a second embodiment.
  • the second exemplary embodiment differs from the first exemplary embodiment in the optical properties of the first optical element 5 and in that this exemplary embodiment has a mirror diaphragm 8.
  • the first optical element 5 is also a reflector here. Regardless of whether the first optical element 5 is implemented as a reflector, lens or catadioptric optics, it is set up, in particular due to its shape and arrangement, and possibly also its refractive index, to focus light propagating in the basic beam path 24 into the intermediate image surface 9.
  • the intermediate image surface 9 lies in the basic beam path 24 between the third optical element 5 and the projection lens 7, a distance between the intermediate image surface 9 and the projection lens 7 corresponding to the interimage side focal length of the projection lens 7.
  • the inner light distribution that occurs as a result of the focusing in a focal area of the projection lens 7 is projected sharply into the lighting zone of the headlight 10.
  • the mirror diaphragm 8 has a diaphragm edge 8.1 and is arranged in the basic beam path 24 between the first optical element 5 and the projection lens 7 so that the diaphragm edge 8.1 is at a distance from the projection lens 7 that corresponds to the inter-image-side focal length of the projection lens 7.
  • the diaphragm edge 8.1 is thus in the focal area mentioned and is therefore used as a sharp cut-off line in the illumination zone of the Projected headlight 10.
  • the mirror diaphragm 8 extends, starting from the diaphragm edge 8.1, in a direction which is opposite to the direction in which the projection lens 7 lies. This direction is preferably parallel to an optical axis of the projection lens 7.
  • the reflective effect is preferably achieved by a metallic coating on that side 8.2 of the diaphragm 8 which faces the first optical element 5.
  • the projection lens 7 images both the pixel light distribution generated with the matrix beam path 22 and the basic light distribution or low beam distribution generated with the basic beam path 24 in the area in front of the headlight 10, so that there is an overall light distribution composed of these two light distributions.
  • the Figure 5 shows a third embodiment.
  • the third exemplary embodiment differs from the first two exemplary embodiments in that a fourth optical element 28 is arranged in the basic beam path 24 (low beam) between the beam splitter 3 and the first optical element 5 in such a way that light incident from the beam splitter 3 enters a focal area of the The first optical element 5 is focused, and that the light of the light source emanating from the focal region illuminates the first optical element 5.
  • the focal area thus represents a light source for polarized light, so to speak.
  • Figure 5 also shows a second diaphragm 30, which is located between the beam splitter 3 and the first optical element 5 and which is in the base beam path 24, more precisely, protrudes into the focal region of the fourth optical element 28.
  • a sharp cut-off line is generated in the focal area, which is generated by the first optical element 5 by direct imaging, i.e. without being passed through the projection lens 7 (shown in FIG Figure 5 is not shown) to be deflected, is directed into the area in front of the headlight 10.
  • the diaphragm can thus be combined with the mirror diaphragm of the previous exemplary embodiment.
  • the second diaphragm 30 is located between the fourth optical element 28 and the first optical element 5 and protrudes into the basic beam path 24, as shown in FIG Figure 3 is shown.
  • This second beam path consists of largely parallel light.
  • the fourth optical element 28 is not present in such a beam path. It can therefore be sufficient to use the second diaphragm 30 without prior focusing by the fourth optical element 28.
  • the second diaphragm 30 can be moved between a first position in which it does not protrude into the basic beam path 24 and a second position in which it protrudes into the basic beam path 24.
  • the sharp light-dark boundary when forming an overall light distribution from both beam paths 22, 24 can be replaced by a less sharp light-dark transition in order to avoid disruptive effects in the overall light distribution or to generate an alternative high beam distribution. This is the case when the diaphragm does not protrude into the beam path.
  • the possibility of generating a sharply delimited basic light distribution or low beam distribution is advantageously retained.
  • the sharp cut-off line is generated when the diaphragm protrudes into the beam path.
  • the position of the second diaphragm 30 is also controlled by the control device 20.
  • the second diaphragm 30 could also be used to completely block the basic beam path 24.
  • Figure 6 shows schematically a preferred embodiment of the beam splitter as an attachment lens.
  • This optical beam splitter attachment differs from the beam splitter cube in that its first light entry face 3.1, the second light exit face 3.3 and the third light exit face 3.4 are convexly curved.
  • the second beam path 24 can also serve to generate a different light distribution, for example a partial high beam distribution or a light distribution serving for side illumination.
  • the basic light or low beam is generated by a separate light module.
  • Figure 7 shows a light distribution 32 as it is generated by a further exemplary embodiment of a headlight according to the invention.
  • This light distribution is provided by one for installation on the right-hand side of the vehicle designed headlights.
  • the Figure 7 an overall light distribution composed of partial light distributions 34 and 36.
  • the horizontal H indicates the position of the horizon when the headlight is used as intended.
  • the vertical V intersects the horizontal H at a point which is defined by the intersection of the main emission direction of the headlight or the vehicle's longitudinal axis with the horizontal.
  • the more central partial light distribution 34 is generated by the first light component propagating in the matrix beam path 22, which can be influenced by the control of the liquid crystal matrix component 4.
  • This more central partial light distribution is supplemented by the more lateral partial light distribution 36, which is generated by the second light component propagating in the basic beam path 24 by a corresponding arrangement and configuration of the first optical element 5.
  • the high-resolution pixel light distribution 34 is obtained in the central area and a light distribution in the form of a block segment 36 in the side area.
  • the disadvantage of this embodiment is that in the driving states in which the lateral light distribution 36 has to be switched off, the light source 1 has to be switched off, so that the pixel light distribution 34 is then also not available in the central part.
  • this can be partially compensated for by the headlight installed on the other side of the vehicle or by a switchable cover 30.
  • the switching-on frequency of the side areas 36 is significantly higher than the switching-on frequency of the more central area 34, so that the cases in which the central area 34 could still be switched on and the side area 36 must be switched off occur less frequently.
  • a polarizing beam splitter 3 as shown in the figure, is to be arranged in such a way that its light exit side 3.2 faces the optical element 6 or the projection lens 7.
  • the interface 3.0 of the beam splitter 3 between its two prisms then does not run from the bottom right to the top left as shown there, for example, but from the bottom left to the top right.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (15)

  1. Phare de véhicule automobile (10) comprenant une source de lumière (1), un dispositif de commande (20) et un composant à matrice à cristaux liquides (4) qui est disposé dans le trajet de faisceau de lumière émanant de la source de lumière (1), dans lequel un séparateur de faisceau polarisant (3) est agencé entre la source de lumière (1) et le composant à matrice à cristaux liquides (4) de telle sorte que le séparateur de faisceau polarisant divise la lumière incidente provenant de la source de lumière (1) en un trajet de faisceau matriciel (22) et un trajet de faisceau de base (24), dans lequel le trajet de faisceau matriciel mène depuis le séparateur de faisceau (3) vers le composant à matrice à cristaux liquides (4) et se compose de composants lumineux qui présentent une première direction de polarisation, et dans lequel le trajet de faisceau de base (24) se compose de composants lumineux qui présentent une deuxième direction de polarisation, et dans lequel le trajet de faisceau de base (24) mène vers un premier élément optique (5) sans toucher le composant à matrice à cristaux liquides (4), qui concentre la lumière incidente dans le trajet de faisceau de base (24), caractérisé par le fait que le composant à matrice à cristaux liquides est divisé en éléments matriciels, qu'un degré de la réflexion de chaque élément matriciel est réglable individuellement par ledit dispositif de commande (20), que les rayons du trajet de faisceau matriciel (22) sont réfléchis sur le composant à matrice à cristaux liquides (4) en fonction du réglage et que le composant à matrice à cristaux liquides est disposé par rapport au séparateur de faisceau polarisant de telle sorte que le trajet de faisceau matriciel (22) traverse à nouveau le même séparateur de faisceau polarisant après une réflexion ayant lieu sur le composant à matrice à cristaux liquides (4) .
  2. Phare selon la revendication 1, caractérisé par une lentille de projection (7) qui est agencée et configurée pour collecter de la lumière de la source de lumière (1) qui émane du composant à matrice à cristaux liquides (4) et pour diriger celle-ci dans la zone avant du phare (10) .
  3. Phare (10) selon la revendication 2, caractérisé par le fait que le premier élément optique (5) dans le trajet de faisceau de base (24) focalise de la lumière se propageant dans une surface d'image intermédiaire (9) qui se trouve dans le trajet de faisceau de base (24) entre le premier élément optique (5) et la lentille de projection (7), dans lequel une distance séparant la surface d'image intermédiaire (9) de la lentille de projection (7) correspond au tirage optique côté image intermédiaire de la lentille de projection (7).
  4. Phare (10) selon l'une quelconque des revendications 2 ou 3, caractérisé par un diaphragme miroir (8) qui présente un bord de diaphragme (8.1) et est disposé dans le trajet de faisceau de base (24) entre le premier élément optique (5) et la lentille de projection (7) de telle sorte que le bord de diaphragme (8.1) se trouve à une distance de la lentille de projection (7), qui correspond au tirage optique côté image intermédiaire de la lentille de projection (7), et lequel diaphragme miroir (8) s'étend à partir du bord de diaphragme (8.1) dans une direction montrant de la lentille de projection (7) vers le bord de diaphragme (8.1).
  5. Phare (10) selon la revendication 4, caractérisé par le fait que le diaphragme miroir (8) s'étend parallèlement à un axe optique de la lentille de projection (7).
  6. Phare (10) selon la revendication 3, caractérisé par un deuxième élément optique (6) qui est disposé dans le trajet de faisceau matriciel (22) entre le séparateur de faisceau (3) et la surface d'image intermédiaire (9) de manière à ce qu'il focalise de la lumière se propageant dans le trajet de faisceau matriciel (22), dans la surface d'image intermédiaire (9).
  7. Phare (10) selon l'une quelconque des revendications précédentes, caractérisé par le fait qu'un quatrième élément optique (28) est disposé dans le trajet de faisceau de base (24) entre le séparateur de faisceau (3) et le premier élément optique (5) de manière à ce qu'il focalise de la lumière incidente provenant du séparateur de faisceau (3), dans une zone focale du premier élément optique (5), et que de la lumière de la source de lumière (1) qui émane de la zone focale éclaire le premier élément optique (5).
  8. Phare (10) selon l'une quelconque des revendications précédentes, caractérisé par un premier diaphragme (30) qui est situé entre le séparateur de faisceau (3) et le premier élément optique (5) et qui fait saillie dans le trajet de faisceau de base (24).
  9. Phare (10) selon la revendication 7, caractérisé par un premier diaphragme (30) qui est situé entre le quatrième élément optique (28) et le premier élément optique (5) et qui fait saillie dans le trajet de faisceau de base (24).
  10. Phare (10) selon la revendication 8 ou 9, caractérisé par le fait que le premier diaphragme (30) peut être déplacé entre une première position dans laquelle il ne fait pas saillie dans le trajet de faisceau de base (24) et une deuxième position dans laquelle il fait saillie dans le trajet de faisceau de base (24).
  11. Phare (10) selon l'une quelconque des revendications précédentes, caractérisé par le fait que le polariseur (3) est un polariseur à couche mince.
  12. Phare (10) selon la revendication 3, caractérisé par le fait que ledit polariseur (3) présente la forme de base d'un cube de séparation de faisceau qui comprend une première surface d'entrée de lumière (3.1) montrant vers la source de lumière (1), une deuxième surface de sortie de lumière (3.3) montrant vers le premier élément optique (5) ainsi qu'une troisième surface de sortie de lumière (3.4) montrant vers la lentille de projection (7), que la surface d'entrée de lumière (3.1) est incurvée de manière à paralléliser la lumière incidente provenant de la source de lumière (1), que la deuxième surface de sortie de lumière (3.3) est incurvée de telle sorte qu'elle focalise la lumière sortante dans une zone focale du premier élément optique (5) qui est située entre la deuxième surface de sortie de lumière (3.3) et le premier élément optique (5) et que la troisième surface de sortie de lumière (3.4) est incurvée de telle sorte qu'elle focalise de la lumière sortante dans la surface d'image intermédiaire (9).
  13. Phare (10) selon l'une quelconque des revendications précédentes, caractérisé par le fait qu'une plaque de recouvrement (14) présente une première zone qui est agencée de manière à être de préférence éclairée par de la lumière se propageant dans le trajet de faisceau matriciel (22) et qui y présente une forme dans laquelle le degré de réflexion pour la première direction de polarisation devient minimale, et que la plaque de recouvrement (14) présente une deuxième zone (14.2) qui est agencée de manière à être éclairée de préférence par de la lumière se propageant dans le trajet de faisceau de base (24) et qui y présente une forme dans laquelle le degré de réflexion pour la deuxième direction de polarisation devient minimale.
  14. Phare selon la revendication 2, caractérisé par le fait que le trajet de faisceau matriciel et le trajet de faisceau de base traversent la même lentille de projection.
  15. Phare (10) selon l'une quelconque des revendications précédentes, caractérisé par le fait qu'un dépolariseur (13) est disposé dans le trajet de faisceau matriciel (22) dans le trajet lumineux en aval du composant à matrice à cristaux liquides (4), qui convertit la lumière polarisée incidente en lumière non polarisée, et qu'un dépolariseur (13) est disposé dans le trajet de faisceau de base (24) dans le trajet de lumière en aval du séparateur de faisceau (3), qui convertit la lumière polarisée incidente en lumière non polarisée.
EP17154621.1A 2016-02-05 2017-02-03 Phare de véhicule automobile équipé d'un élément structurel à matrice à cristaux liquides Active EP3205928B1 (fr)

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DE102016102033.8A DE102016102033A1 (de) 2016-02-05 2016-02-05 Kraftfahrzeugscheinwerfer mit einem Flüssigkristallmatrixbauteil

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JP7044588B2 (ja) * 2018-03-05 2022-03-30 スタンレー電気株式会社 車両用灯具
FR3079599A1 (fr) * 2018-03-29 2019-10-04 Valeo Vision Dispositif de signalisation lumineuse avec ecran lcd
JP7100496B2 (ja) 2018-05-24 2022-07-13 スタンレー電気株式会社 車両用灯具、車両用灯具システム
WO2020010936A1 (fr) * 2018-07-13 2020-01-16 华域视觉科技(上海)有限公司 Procédé de réglage de fonction de faisceau élevé auto-adaptatif basé sur un diviseur de faisceau pbs et module de lumière de véhicule intelligent associé
CN109827137A (zh) * 2018-08-16 2019-05-31 华域视觉科技(上海)有限公司 一种激光大灯及其照明系统、激光安全防护方法
CN110260257A (zh) 2019-07-11 2019-09-20 华域视觉科技(上海)有限公司 一种基于pbs分光器的前照灯单元
WO2024044424A1 (fr) * 2022-08-25 2024-02-29 Apple Inc. Feux de véhicule à fonctions multiples

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