EP2306075A2 - Motor vehicle headlamp with semiconductor sources for generating different light distributions - Google Patents

Abstract

The headlight has a light module comprising a matrix-like arrangement of semiconductor sources i.e. LEDS, a primary lens (3) and a secondary lens. Light emission regions (36, 38, 40) comprising light emission surfaces, which differentiate middle rows (34) in the form of light emission surfaces of adjacent rows (44, 46). A middle light emission region of the middle rows is separated from the adjacent light emission regions of the middle rows by two V-shaped edges during reflection by the secondary lens. The edges are tapered together.

Description

The present invention relates to a motor vehicle headlamp with a light module, which has a matrix-like arrangement of semiconductor light sources, a primary optics and a secondary optics, the primary optics semiconductor light source individual optical fiber sections and a matrix-like arranged light exit surfaces of the light guide sections composite interface with a row with respect to the matrix-like arrangement middle line comprising at least three light exit areas, each of which has at least one light exit surface, and wherein the secondary optics is adapted to image an adjusting on the interface light distribution in a lying in front of the headlamp apron.

Such a motor vehicle headlight is from the DE 10 2008 013 603 A1 known.

The matrix-like arranged light exit surfaces of the known headlight preferably have a square shape. By deliberately turning off individual semiconductor light sources or groups of individual semiconductor light sources with otherwise switched-on other semiconductor light sources, the associated light exit surfaces or groups of light exit surfaces in the otherwise bright illuminated boundary surface of the primary optics appear dark, so that the light distribution on the interface and thus the light distribution in advance of the headlamp on the roadway by switching on and off of semiconductor light sources is controllable.

The well-known headlight serves as a high beam and Teilfernlichtscheinwerfer. A Teilfernlichtverteilung arises from the high beam distribution in that targeted those semiconductor light sources are switched off, whose light would dazzle the oncoming traffic. The position of the oncoming traffic is automatically determined by a corresponding sensor and signal processing, for example by an infrared or radar sensor in conjunction with hardware and software for image processing and used to automatically turn on and / or off and / or dimming the semiconductor light sources.

Due to the square shape, the switchable on and off areas of the light distribution both horizontally extending light-dark boundaries and vertically extending light-dark boundaries. Dipped beam distributions differ from high beam distributions, as is known, in that they have a light-dark boundary which is higher on the side facing away from oncoming traffic than on the side facing the oncoming traffic. This avoids dazzling oncoming traffic and at the same time illuminates the side facing away from oncoming traffic with a comparatively long range. In the case of a headlamp of the type mentioned above, which is designed to produce high beam distributions and partial high beam distributions, this can be done, for example, by switching off semiconductor light sources whose light would be projected into a region above a light-dark boundary.

Known headlamps, which are set up to produce low-beam light distributions, generally have structural measures for producing an asymmetrical low-beam distribution. Examples of such measures are asymmetrically shaped diaphragms, the edge of which is imaged in the projection of the putter in a projection system as a light-dark border, and free-form reflectors of reflection systems, which are shaped so that they preferably reflect the light of a light source in the region lying below a prescribed light-dark boundary.

The known, established for the production of low beam headlights have accordingly, depending on whether they are designed for right-hand traffic or for left-hand traffic, constructive differences, which makes construction and production complex and makes storage difficult. There is therefore a need for headlamps which are used both for the production of dipped-beam light distributions for legal traffic and for Generation of low beam distributions are suitable for left-hand traffic.

A set up for the production of high beam and / or Teilfernlicht headlamps of the type mentioned is initially neither as low beam headlamps for left-hand traffic still as low beam headlamps for legal traffic particularly good, since the respective rules for the course of the chiaroscuro boundaries with the from DE 10 2008 013 603 A1 known forms of light exit surfaces are not only insufficiently satisfiable. In order to save installation space and costs and to gain creative freedom, it is fundamentally desirable to fulfill as many light functions as possible with the same optical structures as light sources, primary and secondary optics.

Against this background, the object of the invention in the specification of a headlamp of the type mentioned, with both a high beam distribution, different Teilfernlichtverteilungen and adapted for legal traffic and rule compliant low beam distribution and adapted for left-hand traffic and rule compliant low beam distribution by controlling the activity of the Can generate semiconductor light sources.

This object is achieved with a headlamp of the type mentioned above in that the light exit surfaces of the middle row differ in their shape from the light exit surfaces of the adjacent line, wherein a central light exit region of the line at a taking place by the secondary optics from viewing by two V-shaped contiguous edges of the adjacent light exit areas of the line is separated.

This embodiment of the middle matrix line makes it possible to make the line appear bright in each case on one side up to one of the V-shaped mutually running edges and to make the complementary side appear dark in each case. As a result, an oblique light-dark boundary is generated within the said line, which is compatible due to its oblique course with the requirements for asymmetric light distribution.

The shape of the light exit surfaces of the adjacent row which deviates from the shape of the light exit surfaces of the middle row permits an optimization of other light distributions, in particular of partial remote light distributions.

The V-shaped running edges can intersect, creating a triangular structure. However, a triangular shape with a cut tip, for example, a trapezoidal shape, but also has V-shaped edges running towards each other.

In this context, a middle row is understood in particular to mean a row which lies between two adjacent rows. For n lines z1 to zn, the middle line can therefore be every line zi with 1 <i <n. For example, the middle row may be the second of three rows, the second of four rows, or the third of four rows. In particular, the number of lines is not limited to even numbers or odd numbers.

A preferred embodiment provides that the light exit areas adjacent to the middle light exit region of the middle row are likewise formed by a V-shape arranged edges are limited, which run in groups parallel to each one of the V-shaped edges of the central region.

This embodiment allows a seamless connection of the light exit areas along a respective obliquely running edge, which allows a seamless joining of their images in the projected light distribution. Depending on whether the two light emission areas involved are dark or light or whether one of the two light emission areas appears dark and the other appears bright, the projected light distribution shows a uniformly dark, uniformly bright or a pattern divided by an oblique light-dark boundary.

It is also preferred that upper edges of the middle light exit region of the middle row and its light exit regions adjacent to one another in the same row are aligned, and that lower edges of the central light exit region and its light exit regions adjacent to one another are in alignment.

This refinement allows the generation of chiaroscuro boundaries in sections in the projected light distribution. Depending on which light exit areas of the middle row and a row above and / or below it appear light or dark, can thus produce a z-shape - dipped beam distribution. A z-shaped light distribution is understood to mean a light distribution which has a light-dark boundary with horizontally extending sections which are offset in height and which are connected to one another by an obliquely or by a vertically extending section of the light-dark boundary. It is also preferred that the upper edges and the lower edges in the installation position of the headlight run horizontally, because this allows a rules-compliant generation of bright-dark boundaries that extend horizontally in sections on a standing in the vehicle front panel.

Furthermore, it is preferred that the light exit surfaces of the light guide sections of the middle row have a planar or a curved triangular shape. Another embodiment provides a pentagon shape based on such a triangular shape. In this embodiment, the light exit surfaces of the light guide sections of the middle row on a flat or a curved pentagon shape, which is composed of a triangle and a rectangle, wherein the two V-shaped converging edges form a tip of the triangle and one side of the rectangle of the Bounded on the opposite side of the triangle.

By means of light exit surfaces with these shapes, both obliquely and horizontally extending sections of light-dark boundaries can be produced in the projected light distribution. By taking place in accordance with a desired light distribution illumination of the associated light exit surfaces of the primary optics by the matrix-like semiconductor light sources so there is the possibility to produce a low beam distribution for right-hand traffic and left-hand traffic with a respective adjusted slope of a light-dark boundary.

A further preferred refinement is characterized in that at least one first row of the matrix adjoining the middle row is arranged relative to the middle row such that the light exit surfaces of this first adjacent row are so arranged by the secondary optics be imaged that their images appear in the projected light distribution below the images of the light emission areas of the middle line and connect seamlessly to the images of the light emission areas of the middle line.

This embodiment allows a generation of low-beam light distributions for both right-hand traffic and left-hand traffic. The bottom line generates, for example, a symmetrical light distribution and the middle line generates an additional light component with a greater range on the opposite side of the oncoming traffic.

In a vehicle equipped with a GPS system (GPS = Global Positioning System), an embodiment provides that the position of the vehicle is determined by the GPS system, it is determined by comparison with stored position data, whether the position in a Land with right-hand traffic or with left-hand traffic is located, and, depending on the result of the comparison, a correspondingly compliant dipped-beam distribution is produced when the dipped-beam headlamp is switched on.

In addition, it is preferred that at least one second row of the matrix adjacent to the middle row of the matrix is arranged relative to the middle row such that the light exit surfaces of this adjacent second row are imaged by the secondary optics such that their images in the projected light distribution above the Images of the light emission areas of the middle row appear and connect seamlessly to the images of the light emission areas of the middle row.

This embodiment additionally allows the generation of a far-reaching high beam and / or partial high beam.

It is also preferred that the light exit surfaces of the line, which generate images lying in the secondary light projected by the secondary optics above the images of the light exit areas of the middle row images, have edges that are perpendicular to one of the horizontally extending edges.

This allows the generation of vertically extending chiaroscuro boundaries in the projected light distribution, which is advantageous for generating partial remote light bundles. If possible, a partial remote beam should appear dark only where other road users could be dazzled and appear bright to the right and left of it. The vertically extending chiaroscuro boundaries allow a close suppression of possibly dazzling light components and a far-reaching illumination of the remaining apron of the motor vehicle.

It is also preferred that the light exit surfaces of both the line above and below the middle line have a quadrangular shape whose adjacent to the horizontally extending edges of the light exit surfaces of the middle line sides each rest against an edge of a light exit surface of the middle side and each exactly are as long as the edges of the light exit surface of the middle row, where they rest.

This embodiment has the desired consequence that adjacent light exit surfaces have common corners and allows a substantial avoidance of disturbing step-like courses, since the adjustable light-dark boundaries over such a corner point in run an escape or change their direction in the corner just by a kink.

Further advantages will be apparent from the dependent claims, the description and the attached figures.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

drawings

Figur 1

eine Schnittdarstellung eines Kraftfahrzeugscheinwerfers;

Figur 2

eine Ausgestaltung einer Primäroptik;

Figur 3

Hauptabstrahlrichtungen und Nebenabstrahlrichtungen von in dem Scheinwerfer propagierendem Licht;

Figur 4

eine Merkmale der Erfindung aufweisende Ausgestaltung einer Primäroptik;;

Figur 5

eine Grenzfläche der Primäroptik im Zustand einer Abblendlichtverteilung für Rechtsverkehr;

Figur 6

eine Grenzfläche der Primäroptik im Zustand einer Abblendlichtverteilung für Linksverkehr;

Figur 7

eine Grenzfläche der Primäroptik im Zustand einer Fernlichtverteilung;

Figur 8

eine Grenzfläche der Primäroptik im Zustand einer ersten Teilfernlichtverteilung;

Figur 9

eine Grenzfläche der Primäroptik im Zustand einer zweiten Teilfernlichtverteilung;

Fig. 10

perspektivische Darstellungen einer Ausgestaltung einer Primäroptik mit eckigen Lichteintrittsflächen;

Fig. 11

perspektivische Darstellungen einer Ausgestaltung einer Primäroptik mit runden Lichteintrittsflächen;

Fig. 12

eine Grenzfläche einer Ausgestaltung einer Primäroptik mit viereckigen Lichtaustrittsflächen einer mittleren Zeile;

Fig. 13

eine Grenzfläche einer Ausgestaltung einer Primäroptik mit fakultativ drei oder fünf Zeilen;

Fig. 14

eine Grenzfläche einer Ausgestaltung einer Primäroptik mit einer mittleren Zeile aus dreieckigen Lichtaustrittsflächen und fünfeckigen Lichtaustrittsflächen; und

Fig. 16

eine Grenzfläche einer Ausgestaltung einer Primäroptik mit einer mittleren Zeile aus dreieckigen Lichtaustrittsflächen und fünfeckigen Lichtaustrittsflächen.

Embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description. In this case, the same reference numerals in the various figures denote the same elements. In each case, in schematic form:

FIG. 1

a sectional view of a motor vehicle headlight;

FIG. 2

an embodiment of a primary optic;

FIG. 3

Main emission directions and subsidiary emission directions of light propagating in the headlamp;

FIG. 4

a feature of the invention having design of a primary optics;

FIG. 5

an interface of primary optics in the condition of a passing beam for right-hand traffic;

FIG. 6

an interface of the primary optics in the state of a low-beam distribution for left-hand traffic;

FIG. 7

an interface of the primary optics in the state of a high beam distribution;

FIG. 8

an interface of the primary optics in the state of a first sub-distance distribution;

FIG. 9

an interface of the primary optics in the state of a second partial long-distance distribution;

Fig. 10

perspective views of an embodiment of a primary optic with angular light entry surfaces;

Fig. 11

perspective views of an embodiment of a primary optic with round light entry surfaces;

Fig. 12

an interface of a design of a primary optic with quadrangular light exit surfaces of a middle row;

Fig. 13

an interface of one embodiment of a primary optic with optionally three or five rows;

Fig. 14

an interface of a design of a primary optic with a middle row of triangular light exit surfaces and pentagonal light exit surfaces; and

Fig. 16

an interface of an embodiment of a primary optic with a middle row of triangular light exit surfaces and pentagonal light exit surfaces.

In detail, the shows Fig. 1 a sectional view of a motor vehicle headlight 1 with a light module 2, which has a matrix-like arrangement of semiconductor light sources, a primary optics 3 and a secondary optics 4.

The light module 2 is arranged in a housing 5 of the motor vehicle headlight 1. The housing 5 has a light exit opening, which is covered by a transparent cover 6. The matrix-like arrangement of semiconductor light sources is in the illustrated embodiment on a circuit board 7 arranged.

The circuit board 7 is in a preferred embodiment, a rigid circuit board or a flexible circuit board. A flexible circuit board has the advantage that it allows a curved in space, in particular concavely curved connection surface for the semiconductor light sources through which already results in a certain bundling effect. In contrast, rigid circuit boards have the advantage of lower costs and better manageability in the production of the headlamp and greater stability.

It is also preferred that the circuit board is designed as a structural unit with cooling elements for the semiconductor light sources, in order to be able to dissipate reliably the electrical waste heat arising during operation.

An optical axis 8 extends substantially horizontally from the arrangement of the semiconductor light sources on the board, starting through the primary optics 3 and the secondary optics 4. Fig. 1 shows insofar as a along the optical axis 8 cut pig head 1 from the side, ie from a direction transverse to the optical axis 8 viewing direction.

The light module 2 preferably has at least one reflective and / or absorbing surface 9. In the illustrated embodiment, the surface 9 constitutes a shutter element, which is arranged laterally on a wall in a tube 10 and which extends transversely to the optical axis 8 into the interior of the light module 2.

In the secondary optics 4 is preferably an achromatisch acting arrangement of two lenses 11, 12 with different refractive index, which represents by the respective material and the shape of the two lenses 11, 12 a color aberration correcting double lens.

Fig. 2 shows an embodiment of a primary optics 3 together with an array of semiconductor light sources 13, 14, 15, 16. The semiconductor light sources are in the Fig. 2 just for the sake of clarity without the board 7 from the Fig. 1 shown. As semiconductor light sources 13, 14, 15, 16, light-emitting diodes (LEDs) are used in one embodiment.

Depending on the configuration, the semiconductor light sources have a rectangular or a light exit surface deviating from the rectangular shape due to the desired light distribution and emit light in the approximately white color desired for headlight light distributions. In an alternative embodiment, RGB LEDs are used, that is to say combinations of red, blue and green LEDs, which together produce a colorless white light or which together give a desired mixed color.

The primary optics 3 has semiconductor light source-individual light guide sections 17, 18, 19, 20 and an interface 25 composed of matrix-like light exit surfaces 21, 22, 23, 24.

Each optical waveguide section receives light from a semiconductor light source or group of semiconductor light sources which is individually assigned only to it in structural terms, and allows this light to emerge essentially via a light exit surface structurally associated with it.

The structural assignment results from the fact that a imaginary extension of the longitudinal axis of a light guide section intersects both the structurally associated semiconductor light source and the structurally associated light exit surface.

As a result, a light distribution is generated on the interface 25 in which the pattern of the switched-on and switched-off semiconductor light sources is imaged.

The secondary optics 4, as in one embodiment in the Fig. 1 is configured to project a light distribution which is established on the interface 25 into a front field located in front of the headlight 1. Because the semiconductor light sources can be switched on and off individually or in groups, the projected light distribution can be influenced by selective switching on and off of semiconductor light sources.

A respectively first light guide section 18 and a respective first light exit surface 22 are set up to direct light received by a respective first semiconductor light source 14 in a main emission direction 26 to the secondary optics. The beams 27 and 28 represent secondary radiation directions. The light emitted in these directions 27, 28 should not influence the light distribution produced by the secondary optics from the light of the main emission directions.

Each elongated optical waveguide section 17, 18, 19, 20 is arranged with its light exit surface 21, 22, 23, 24 opposite end immediately in front of its associated semiconductor light source 13, 14, 15, 16 or group of semiconductor light sources to receive outgoing light from them. The light to be recorded becomes initially coupled by refraction into the interior of the light guide section and then forwarded mainly by taking place on lateral transport surfaces total reflection in the direction of its light exit surface. In this sense, lateral surfaces are characterized in that their surface normal is aligned transversely to the optical axis 8.

Due to its special shape, which is characterized by a growing in the direction of light propagation and thus widening cross-section, and by multiple reflection at the transport walls, the light guide reduces the opening angle of the light beam penetrating it. The light is bundled and thus homogenized. Homogeneous light is understood to mean a light which illuminates the light exit surface of the light guide section uniformly. The light exit surface is illuminated homogeneously with light of similar propagation direction.

The widening cross-section is preferably achieved by side faces extending in the light propagation direction, which are conically and / or concavely curved at least in sections and thus define a funnel-shaped structure.

In the illustrated embodiment, the transport surfaces of adjacent optical fiber sections approach each other with increasing approach to the light exit surfaces. Depending on the embodiment, the primary optics 3 consists of individual, separate optical fiber sections or is realized as a one-piece arrangement of optical fiber sections.

In any case, it is preferable that the optical fiber sections are optically coupled together at their light exit surface-side end. In this case, an optical coupling is understood to mean that certain portions of the light propagating in an optical waveguide section are not coupled out via its light exit surface, but initially enter an adjacent optical waveguide section. This light ultimately leaves the primary optics via the light exit surface of the adjacent light guide section.

In comparison with light which is incident on a light exit surface without a change of the light guide section, the light incident from an adjacent light guide section has a comparatively flat angle of incidence. It is therefore not broken in Hauptabstrahlrichtungen 26, as shown in the Fig. 3 are shown, but it is broken in Nebenabstrahlrichtungen 27, 28.

The light exit surfaces 21, 22, 23, 24 are arranged in a preferred embodiment to reduce the opening angle of the exiting light bundles, which reach the subsequent imaging secondary optics 4, even further. For this purpose, they preferably have a convex pillow-shaped form. Due to the multiple reflection in the light guide sections and the further focusing at the light exit surfaces, a homogenous luminance distribution is combined on the interface 25, which has no or strongly suppressed grid structures and which does not map the spatial separation between the semiconductor light sources. The spatial separation between the semiconductor light sources is advantageous for their electrical connectivity and also for dissipating electrical waste heat which arises during operation in the semiconductor light sources.

At the same time, adjacent light exit surfaces in each case direct inhomogeneity-causing light components which propagate, for example, in the secondary emission directions 27, 28 away from the imaging secondary optics, so that these light components can not contribute to the image and no disturbing light-dark structures in the light distribution generated on the roadway to generate.

Fig. 3 2 shows how the light bundle bounded by main emission directions 26, which is coupled out of the optical waveguide section lying directly above the optical axis 8, passes into the imaging secondary optics 4. In addition, the shows Fig. 3 how a suitable arrangement of diaphragm or shutter surfaces 9 prevents the interfering light components of the secondary emission directions 27 and 28 from reaching the road ahead of the driver and disturbing a desired light distribution there.

Fig. 4 shows a features of the invention having embodiment of a primary optic 3 in a perspective view. The primary optics 3 has semiconductor light source-individual light guide sections 30.1, 30.2, 30.3, 30.4 and further light guide sections, which are not provided with their own reference numerals for reasons of clarity. In addition, shows Fig. 4 a matrix-like arranged light exit surfaces 32.1, 32.2. 32.3, 32.4 of the light guide sections 30.1, 30.2, 30.3, 30.4 and the other light guide sections composite interface 25 with respect to the matrix-like arrangement middle line 34th

The middle row 34 is composed of at least three light exit areas 36, 38, 40. In the Fig. 4 These are a left triangular or pentagonal light exit surfaces comprehensive left light exit region 36, a three hatched triangular or pentagonal light exit surfaces comprehensive central light exit region 38 and eight triangular or pentagonal light exit surfaces comprehensive light exit area 40. The division into eight, three and again eight light exit surfaces serves only the Presentation. It is only essential that each of the three light exit areas has at least one light exit surface.

The light exit surfaces 42 of the middle row 34 differ in their shape from the light exit surfaces 32.1, 32.4 of the adjacent lines 44, 46. While the light exit areas 32.1, 32.4 of the lines 44 and 46 have four corners in the illustrated embodiment, the light exit surfaces 42 of the light guide sections the middle row has a flat or curved triangular shape or a flat or domed pentagon shape.

In the illustrated embodiment, the light exit surfaces 42 are convex bulging like a pillow and sit, as can be seen from the details of the illustrated light exit surface 42, composed of a triangle and a rectangle, wherein the two V-shaped converging edges form a tip of the triangle and wherein one side of the rectangle delimits the side of the triangle opposite the top. A width of the triangle therefore corresponds to a width of the rectangle. The in the Fig. 3 illustrated light exit surfaces are pentagonal.

In this case, the triangular configuration and the pentagonal design have in common that they allow a structure of the middle line 34, in which a middle light exit region 38 of the middle line 34 at a taking place by the secondary optics from viewing by two non-parallel, v-shaped converging edges 48, 50 is separated from the adjacent light exit areas 36, 40 of the middle row 34. A common feature of these embodiments is that they allow a structure of the central line 34, in which the light exit regions 36, 40 arranged adjacent to the middle light exit region 38 of the middle row 34 are likewise delimited by V-shaped edges which are parallel to one of the groups in groups V-shaped edges of the central region run.

It is preferred that the edges are realized as a crescent-shaped, that is, a V-shaped cross-section recesses in an otherwise integrally contiguous interface 25 of the primary optics 3. In the embodiment, in the Fig. 4 is illustrated, the primary optics 3 is composed of a rear part and a front part.

Both parts are preferably integral parts of a one-piece basic form. The rear part comprises the separately extending optical fiber sections. The front part lies between the rear part and the cushion-like structured interface 25, via which a decoupling of the homogenized by the primary optics light in the direction of secondary optics and on the moreover a targeted decoupling disturbing light components takes place in the Nebenabstrahlrichtungen.

The primary optic 3 is preferably made of silicone. Silicone is a highly transparent material and has a high temperature resistance up to approx. 260 ° C. Heated silicone is particularly thin and can be sprayed during the injection molding in relatively filigree structures. In other embodiments, they consist of glass, plastic or a technically comparable material.

By means of the secondary optics 4, the light exit surfaces of the line 46 are imaged such that their images appear in the projected light distribution above the images of the light exit regions of the middle line 34 and connect seamlessly to the images of the light exit regions of the middle line 34.

Analogously, the secondary optics form the light exit surfaces of the line 44 in such a way that their images appear in the projected light distribution below the images of the light exit regions of the middle line 34 and seamlessly follow the images of the light exit regions of the middle line 34.

The Fig. 5 to 9 show various light distributions generated on the interface 25. In each case, the areas bordered in bold represent the entirety of the light exit areas appearing bright on the boundary surface 25. These light distributions are projected by the secondary optics 4 into the apron located in front of the spotlight 1. In an image by a single lens or by a designed as Achromat double lens as secondary optics 4, the light distribution generated in front of the headlight 1 is upside down compared to the light distribution pattern on the interface 25 and is reversed.

Fig. 5 shows a light distribution on the interface 25, which meets the requirements for a dipped beam for right-hand traffic. The line 44 generates a symmetrically distributed brightness pattern above the horizontal edge 51. For this purpose, in one embodiment, all half-light sources belonging to the line 44 are turned on. The line 34 generates a horizontally lying edge 52 lying lower to the right than the edge 51 and an obliquely running edge 53 connecting the edges 51 and 52. For this purpose, the semiconductor light sources are turned on in the illustrated embodiment, the light exit surfaces lying to the left of the edge 53 Line 34 belong. The remaining semiconductor light sources associated with row 34 remain off. In addition, the semiconductor light sources belonging to row 46 remain switched off.

As a result, this is compared to the Fig. 5 reversed and upside down light distribution generated on the road, in which the roadway is lit right further than the left, with illuminated areas on both sides by horizontally extending, as images of the edges 51, 53 generated light-dark boundaries are limited, and wherein the different distances , or lying differently high in front of the vehicle chiaroscuro boundaries are connected by an oblique mapping of the edge 53.

Together with a further edge 54, the edge 53 forms a pair of edges running in a V-shape which separate a central light exit region of the middle row 34 from adjacent light exit regions of the middle row 34. Notwithstanding the embodiment, in conjunction with the FIG. 4 has been explained, the mean light exit area here only a light exit surface 55.

The Fig. 5 shows, as well as the FIGS. 6 to 9 , an interface 25 composed of matrix-like light exit surfaces of optical waveguide sections of a primary optics 3 with a central row 34 with respect to the matrix-like arrangement, which comprises at least three light exit areas, each of which has at least one light exit surface, wherein the light exit surfaces of the middle row are in shape differ from the light exit surfaces of the adjacent line, and wherein a central light exit region of the central line is separated from the adjacent light exit regions of the middle line in a secondary optics by viewing two V-shaped converging edges 53, 54.

The FIGS. 5 to 9 continue to illustrate, as well as the Fig. 4 in that lower edges of the central light exit region 55, or of the light exit region 38 in the Fig. 4 , and its each in the same line adjacent light exit areas in an alignment 56, and that upper edges of the central light exit region of the central line 34 and its in the same line 34 adjacent light exit areas are in alignment 57. See also Fig. 4 ,

The upper edges and lower edges lying in an alignment 57, or 56, respectively, in a preferred embodiment run horizontally in the installation position of the headlamp 1.

The light-emitting surfaces of the line 46, in the of the Secondary optics 4 projected light distribution above the images of the light exit areas of the middle line 34 produce images, have edges 58 which are perpendicular to one of the horizontally extending edges 51, 52 extend. Among other things, the vertical edges allow minimization of areas that are to be darkened for a partial high beam in order to reduce dazzling of other road users.

The disadvantage, however, is that as a result of a desired mosaic-like composition of the desired light distribution, for example, a Teilfernlichtverteilung, color fringes at the light-dark boundaries of the projected light distribution arise. They result in particular from the fact that the edges of a darkened to avoid dazzling portion of a high beam distribution have both vertically and horizontally extending light-dark boundaries and the usual color correction using only horizontally scattering structures in the light exit surface of the secondary optics color errors that result occur in different directions running light-dark boundaries, not compensate in sufficient. It would be advantageous here a scattering structure that scatters both horizontally and vertically. In this context, it should be mentioned that an embodiment of the secondary optics as achromatic allows a substantial reduction in the color fringing of otherwise orthogonal light-dark boundaries.

The light exit surfaces of both above and below the middle line 34 extending lines 44, 46 have a quadrangular shape, which adjacent to the horizontally extending edges of the light exit surfaces of the middle line sides each at an edge of a Light emission surface of the middle side abut and each are just as long as the edges of the light exit surface of the middle line where they rest.

Fig. 6 represents a light distribution pattern on an interface 25 of a primary optics, with which a demand-conforming low-beam distribution for left-hand traffic is generated.

The Fig. 7 illustrates a light distribution pattern on an interface 25 of a primary optic, with which a long-range, symmetrically distributed high beam is generated. For this purpose, all semiconductor light sources of the lines are activated in the illustrated embodiment. In a further embodiment, some of the semiconductor light sources are dimmed, so that the outer light exit surfaces appear less bright than the inner light exit surfaces. As a result, the driver's attention is intuitively more focused on the comparatively brighter illuminated central areas of the light distribution, which is desirable in a high beam distribution.

The FIGS. 8 and 9 represent embodiments of light distributions on a boundary surface 25 of a primary optics, with which different Teilfernlichtverteilungen be generated. The Teilfernlichtverteilungen go from the high beam distribution in that individual light exit areas 59, 60 in the form of individual light exit surfaces or groups of light exit surfaces are not illuminated by their associated semiconductor light sources and thus appear dark. The two embodiments of Teilfernlichtverteilungen included in the FIGS. 8 and 9 illustrate how, by a variation of the number and the arrangement of the non-illuminated light exit surfaces, the shape, width and position of darkened areas, which result as images of the light exit areas 59, 60, is variable in a Teilfernlichtverteilung.

The light exit surfaces of both the above and below the middle row line extending preferably have a quadrangular shape, adjacent to the horizontally extending edges of the light exit surfaces of the middle row adjacent sides each at an edge of a light exit surface of the middle side and each are just as long like the edges of the light exit surface of the middle line where they rest.

As 8 and 9 show, this embodiment has the desired consequence that adjacent light exit surfaces have common corners. This allows a largely avoiding disturbing step-like progressions, since the adjustable chiaroscuro borders extend over such a corner point in an alignment or change their direction in the corner point merely by a kink.

Fig. 10 shows perspective views of an embodiment of a primary optic 3 with angular light entry surfaces 62 (see Fig. 10a ) and pentagonal light exit surfaces 64 of a middle row 66 (cf. Fig. 10b )

Fig. 11 shows perspective views of an embodiment of a primary optic 3 with round light entry surfaces 68 (see Fig. 11a ) and pentagonal light exit surfaces 70 of a middle row 72 (compare Fig. 11b ).

Fig. 12 shows an interface 25 of an embodiment of a primary optic 3 with quadrangular light exit surfaces 74 a middle line 76. The light exit surfaces 74 are bounded on the right and left of v-shaped successive edges and up and down by horizontally and mutually parallel edges. The longer of the two horizontally extending edges defines a light exit surface 75, which is larger than a light exit surface 77, which is bounded by the shorter of the two horizontally extending edges. In order to achieve approximately the same brightness of the light exit surfaces 75 and 77 despite the different size of the light exit surfaces, one embodiment provides that the larger of the two light exit surfaces is subdivided into a first subarea and a second subarea, each having its own semiconductor light source Light guide section is illuminated. In the embodiment, in the Fig. 12 is shown, this optional subdivision is illustrated by the vertical dashed line 78.

Fig. 13 shows an interface 25 of an embodiment of a primary optic 3 with a central line 80 of triangular light exit surfaces 82. The middle line 80 is between at least one upper row and a lower rows, the light exit surfaces are rectangular in the illustrated embodiment. The horizontally extending dashed lines 84 and 86 illustrate an optional subdivision of the above the middle line 80 lying light exit surfaces in upper partial surfaces 88 and lower partial surfaces 90 and lying below the middle line 80 light exit surfaces in upper partial surfaces 92 and lower partial surfaces 94. Each partial surface is also illuminated here by its own semiconductor light source via its own light guide section. With the described subdivision, the in the Fig. 13 illustrated primary optics on five lines. Without this subdivision, it has three lines.

Fig. 14 shows an interface 25 of an embodiment of a primary optic 3 with a central line 96, which is composed of triangular light exit surfaces 98, 100 and pentagonal light exit surfaces 102 and 104.

16 shows an interface 25 of an embodiment of a primary optic 3 with a middle row 106 which is composed of triangular light exit surfaces 108, 110 and pentagonal light exit surfaces 102 and 104.

Claims (10)

Motor vehicle headlight (1) with a light module (2), which has a matrix-like arrangement of semiconductor light sources (13, 14, 15, 16), a primary optics (3) and a secondary optics (4), wherein the primary optics (3) semiconductor light source individual light guide sections (17, 18, 19, 20) and a matrix-like arranged light exit surfaces (21, 22, 23, 24) of the optical fiber portions composite interface (25) having a relation to the matrix-like arrangement middle row (34), which consists of at least three light exit areas (36, 38, 40), each of which has at least one light exit surface, and wherein the secondary optics (4) is adapted to image a distribution of light on the interface (25) into a front field located in front of the headlight (1), characterized in that the light exit surfaces of the middle row (34) in shape from the light exit surfaces of an adjacent line (4 4, 46), wherein a middle light exit region (55) of the middle line (34) at a viewing from the secondary optics (4) by two V-shaped converging edges (53, 54) of the adjacent light exit regions of the middle Line (34) is disconnected. Headlight (1) according to Claim 1, characterized in that the light exit areas adjacent to the middle light exit region of the middle row (34) are likewise delimited by V-shaped edges which run in groups parallel to one of the V-shaped edges (53, 54). of the central region (55). Headlamp (1) according to claim 2, characterized in that upper edges of the central light exit region (38; 55) of the central line (34) and its in the same line (34) adjacent light exit regions (36, 40) are in alignment (57) and that lower edges of the central light exit region (38; 55) and its light exit regions (36, 40) which are adjacent in the same line (34) are aligned (56). Headlight (1) according to claim 3, characterized in that the upper edges and the lower edges in the installed position of the headlamp (1) extend horizontally. Headlight (1) according to one of the preceding claims, characterized in that the light exit surfaces of the light guide sections of the central line (34) have a planar or a curved triangular shape. Headlamp (1) according to one of the preceding claims, characterized in that the light exit surfaces of the light guide sections of the central line (34) have a planar or a convex pentagonal shape, which consists of a triangle and a rectangle, wherein the two V-shaped converging edges form a tip of the triangle and one side of the rectangle bounding the tip of the opposite side of the triangle. Headlamp (1) according to one of the preceding claims, characterized in that at least one first row (44) of the matrix adjacent to the middle row (34) is arranged relative to the middle row (34) such that the light exit surfaces of this adjacent row (44) 44) are imaged by the secondary optics (4) such that their images appear in the projected light distribution below the images of the light exit areas of the middle line (34) and connect seamlessly to the images of the light exit areas of the middle line (34). Headlamp (1) according to one of the preceding claims, characterized in that at least one second row (46) adjoining the middle row (34) of the matrix is arranged relative to the middle row (34) so that the light exit surfaces of this adjacent row (46) 46) are imaged by the secondary optics (4) in such a way that their images appear in the projected light distribution above the images of the light exit regions of the middle line (34) and connect seamlessly to the images of the light exit regions of the middle line (34). Headlight (1) according to claim 8, characterized in that the light exit surfaces of the line (46) which generate images lying in the secondary light (4) projected light distribution above the images of the light exit regions of the middle line (34), edges (58) own, which run perpendicular to one of the horizontally extending edges. Headlamp (1) according to one of claims 7 to 9, characterized in that the light exit surfaces of both the above and below the central line (34) extending line (44, 46) have a quadrangular shape, to which the horizontally extending edges of Light exit surfaces of the middle row adjacent sides each bear against an edge of a light exit surface of the middle side and are each as long as the edges of the light exit surface of the middle line where they rest.

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