EP3412963B1 - Transparent component arrangement of a light module and light module comprising such a transparent component arrangement - Google Patents

Description

The present invention relates to a transparent component arrangement of a lamp module according to the preamble of claim 1. Such a component arrangement is from DE 10 2005 003 367 A1 known.

The invention also relates to a lamp module of a motor vehicle lamp which has such a component arrangement.

In the area of signal lights of a motor vehicle, elongated light exit surfaces which shine as extended strips have been desired for some time. An elongated light exit surface has a significantly greater length than height. Such lights are, for example, in the front area of a motor vehicle for generating daytime running lights, a position or Parking light or a flashing light or used in the rear area of a motor vehicle to generate a rear light, a brake light, a flashing light or a reversing light. Various options for realizing such an elongated light exit surface are known from the prior art. Important aspects for the design of such lights include inexpensive manufacture and assembly of the light as well as the most homogeneous possible illumination of the elongated light exit surface of the light.

From the U.S. 5,931,576 a transparent component arrangement is known in which partial areas of a circular beam of rays are coupled into individual complex light guides and are each guided by these to an exit surface of the light guide. All light guides together thus form a redistribution section. The exit surfaces of the light guides are arranged next to one another, each exit surface of a light guide forming a partial area of the light exit surface of the light module. The problem with this known component arrangement is the configuration of the redistribution section with a large number of individually manufactured light guides and the complex structure of the individual light guides. The assembly of the component arrangement, in particular the alignment of the individual light guides relative to the beam, as well as the attachment and mounting of the individual light guides are very complex and expensive. In addition, the known component arrangement serves to generate a headlight function, for example a low beam with a horizontal light-dark border, and not a lighting function. For this reason, the exit surfaces of the light guides do not form a flat light exit surface either. In addition, remains Due to the complex courses of the individual light guides, the parallel course of the light rays of the bundle of rays to one another during the deflection in the redistribution section is not maintained, so that homogeneous illumination of the exit areas of the individual light guides and thus the entire light exit area can at best be realized with additional effort.

Furthermore, from the DE 10 2014 218 991 A1 a transparent component arrangement for bundling and redistributing the light emitted by a light source to partial areas of a light exit surface of the lamp module for generating an elongated light distribution with a greater horizontal than vertical extent is known. In this case, light emitted by a light source in a main emission direction with a Lambertian emission characteristic is coupled into the component arrangement via a coupling section and bundled by means of a bundling section to form a bundle of rays with parallel light rays. The bundling section is implemented in the form of a transparent solid body with a circular cross section with respect to the main emission direction of the light source, so that it generates a beam with light beams running parallel to one another. This bundle of rays emerges from the bundling section via an annular exit surface, so that the bundle of rays also has an annular shape. The exit surface is divided into a number of equally large facet-like segments, with each facet directing a partial area (segment) of the beam onto a faceted light entry surface of an elongated transparent luminous element by means of refraction at the facet. The length of the filament is significantly larger than its height. The facets of the entry surface are arranged next to one another on a first longitudinal side of the luminous element. The opposite long side of the luminaire body forms the light exit surface of the luminaire module. The light rays of the various partial areas of the beam that fall on the facets of the entry surface of the luminous element pass through the luminous element and strike different partial areas of the light exit area. The light emerging from the luminous element via the various partial areas of the light exit surface then generates an elongated light distribution.

In this prior art, the redistribution section thus consists of several facets which divert subregions of the beam onto the various subregions of the light exit surface of the light module by means of refraction. Furthermore, the known transparent component arrangement has the disadvantage that both the facets on the exit surface of the bundling section and the facets of the entry surface of the transparent luminous element have to be individually designed in a very complex manner so that the partial areas of the beam from the circular ring segment-shaped facets of the exit surface of the bundling section onto the above the longitudinal extension of the entry surface of the luminous element meet rectangular facets arranged distributed and the subregions of the light exit surface of the lamp module are illuminated as homogeneously as possible. It is obvious that on the rather complicated path of the light rays from the bundling section to the light exit surface of the lamp module, the originally largely parallel course of all the light rays of the beam is lost, so that a homogeneous illumination of the whole Light exit surface is hardly possible.

Proceeding from the prior art mentioned, the present invention is based on the object of designing and developing a transparent component arrangement and a light module of the type mentioned at the outset in such a way that simple and inexpensive production and assembly, the most homogeneous possible illumination of the light exit surface and a light exit surface with a particularly low height can be achieved compared to their longitudinal extent.

To achieve this object, a transparent component arrangement having the features of claim 1 is proposed.

The light source is preferably designed as a half-space radiator and comprises, for example, at least one light-emitting diode (LED). The light source preferably emits light with an approximately lambertian emission characteristic in a main emission direction into a 180 ° half-space.

The bundle of rays bundled by the bundling section preferably has a circular cross section. However, it would also be conceivable for the beam to have a rectangular shape, for example with rounded corners. It is crucial that the light rays emitted by the light source with a relatively large emission angle are bundled through the bundling section into a bundle of rays with largely parallel light rays, which are then in a particularly simple but efficient manner within the scope of the present invention while maintaining the parallelism of the light rays with one another through the redistribution section in the corresponding partial areas of the light exit surface of the light module can be deflected.

The individual sections of the transparent component arrangement are designed as transparent solid bodies. They consist of a transparent material, in particular PC, PMMA or PMMI. The coupling section and the bundling section are preferably designed as a single integral component. It is thus conceivable, for example, that this component is designed in the form of what is known as an attachment lens or TIR (total internal reflection) lens. A front lens has a coupling-in section with a depression and several light entry surfaces in the area of this depression. The light source mainly radiates its light into this recess and onto the entry surfaces. A bottom of the recess extends at least in some areas perpendicular to a main emission direction of the light source and forms a first light entry surface. On a side opposite the first entry face, the ancillary optics have a first light exit face. The first entry surface and / or the first exit surface can be curved in the manner of a lens. Light rays that enter the ancillary optics via the first entry surface and exit it again via the first exit surface are bundled, in particular collimated, by means of refraction.

Furthermore, an optical attachment comprises at least one second light entry surface, which is preferably aligned parallel or with a slight inclination at an angle to the main emission direction of the light source. Light beams emitted by the light source at an angle to the main emission direction hit this entry surface and enter the ancillary optics from the side. There they first encounter totally reflective interfaces of the ancillary optics and are deflected by these onto at least one second light exit surface of the ancillary optics. This exit surface extends at least over part of the circumference of the first exit surface. The light beams reflected from the boundary surfaces exit the ancillary optics parallel to the light beams exiting through the first exit surface via the second exit surface. Light rays that enter the ancillary optics via the second entry surface and exit it again via the second exit surface are bundled, in particular collimated, by means of refraction and total reflection (TIR).

Instead of a TIR ancillary optics, a lens, in particular a plano-convex lens, can also be used to focus the light beams emitted by the light source.

One advantage of the present invention is that the transparent component arrangement is particularly simple and can therefore also be produced simply and inexpensively and that the parallel course of the light beams of the beam to one another is nevertheless maintained during the entire deflection in the redistribution section. As a result, the individual sub-areas of the light exit surface of the light module can be illuminated particularly homogeneously.

According to an advantageous further development of the present invention, the coupling, bundling and redistribution sections are designed as a single integral component. The entire transparent component arrangement is thus a solid body made of a transparent plastic material, in particular PC, PMMA or PMMI, educated. This has great advantages in terms of cost-effective production, since the entire transparent component arrangement can be produced in one production step. The component arrangement can be produced, for example, by means of an injection molding process.

According to a preferred embodiment, it is proposed that the coupling-in section has a rotationally symmetrical shape, with an axis of rotation being congruent with a main direction of emission of the light by the light source. Accordingly, it is also proposed that the bundling section has a rotationally symmetrical shape, with an axis of rotation congruent with a main direction of emission of the light by the light source.

The redistribution section of the transparent component arrangement preferably has a longitudinal extension along the light exit surface and perpendicular to a main emission direction of the light source. The length of the redistribution section corresponds approximately to the length of the light exit surface with the sub-areas arranged next to one another, to which the deflected light beams of the sub-areas of the beam are deflected. Of course, optically effective structures (e.g. any lenses, cylinder optics, cushion optics, scatter optics, prisms, etc.) can be arranged on the light exit surface in order to achieve a desired light distribution of the luminaire module from the light emerging via the light exit surface. In particular, it is conceivable to scatter the exiting light beams horizontally in order to achieve a light distribution that is wider than the light exit surface and to make the light or the light emitted by it visible Improve light through other road users from larger lateral angles.

According to a preferred embodiment of the present invention, it is proposed that the reflective facets of the redistribution section deflect light incident on them by means of total reflection. The facets can thus be designed as totally reflective boundary surfaces of the redistribution section designed as a transparent solid body. These surfaces can be produced with a high degree of accuracy in an injection molding process. Since the redistribution section of the transparent component arrangement has a very low height, which is in the range of a few millimeters (e.g. 2.5 mm), there is at best minimal material shrinkage when the injection-molded plastic part hardens, so that the transparent component arrangement and in particular the reflective facets of the Redistribution section can be produced with a particularly high level of accuracy.

According to another advantageous development of the present invention, it is proposed that the reflective facets of the redistribution section include first reflective surfaces, second reflective surfaces and third reflective surfaces. The first reflective surfaces are designed to deflect the light beams from at least some of the partial regions of the beam in the direction of the second reflective surfaces, perpendicular to a main emission direction of the light source and along a longitudinal extension of the redistribution section. This means that the first reflection surfaces are arranged and aligned in the redistribution section in such a way that those that have entered the redistribution section Light rays from at least some of the partial areas of the beam impinge directly on the first reflection surfaces and are deflected by them. The second reflective surfaces are designed to deflect light beams deflected by the first reflective surfaces in the direction of the corresponding third reflective surfaces, parallel to the main emission direction of the light source and perpendicular to the direction of the light beams deflected by the first reflective surfaces. The third reflection surfaces are formed, light beams deflected by the second reflection surfaces in the direction of the corresponding partial areas of the light exit surface, perpendicular to the main emission direction of the light source, perpendicular to the direction of the light beams deflected by the first reflection surfaces and perpendicular to the direction of the light beams deflected by the second reflection surfaces redirect. The light beams of the various partial areas of the beam bundle deflected by the first reflection surfaces can run in the redistribution section at the same height (viewed from above) but next to one another or (viewed from the front) one behind the other. This allows a particularly low overall height of the redistribution section in the range of only a few millimeters.

According to a preferred embodiment of the invention, the light rays of a partial area of the beam, the light of which the redistribution section deflects onto a central partial area of the light exit surface, strike at least one of the third reflective surfaces directly without hitting one of the first reflective surfaces or one of the second reflective surfaces beforehand. The light rays of the partial area of the beam, which on the central partial area of the Light exit surface are deflected, so are not deflected at first reflective surfaces along the longitudinal extent of the redistribution section and perpendicular to the main emission direction of the light source, in order to then hit second reflective surfaces, which then deflect them in the direction of the third reflective surface. Rather, after entering the redistribution section, these light rays impinge directly on the third reflective surfaces, which deflect the light rays in the direction of the central portion of the light exit surface perpendicular to the main emission direction of the light source and perpendicular to the longitudinal extent of the redistribution section.

All other light rays, which are not deflected onto the central partial area of the light exit surface, must first be propagated more or less far along the longitudinal extension of the redistribution section by means of the first reflective surfaces before they hit the second reflective surfaces, which they then move towards the deflect third reflection surface, which then deflect the light beams in the direction of the corresponding decentrally arranged subregions of the light exit surface.

Accordingly, it is proposed that the second reflective surfaces, which deflect the light beams propagating in the redistribution section in the direction of the third reflective surfaces, have a differently large distance from the first reflective surfaces, corresponding to a distance between the corresponding subregions of the light exit surface to which the second reflective surfaces are assigned Third reflective surfaces deflect the light beams to the central partial area of the light exit surface.

It is further proposed that the third reflective surfaces, which deflect the light beams coming from the second reflective surfaces assigned to them in the direction of the corresponding decentrally arranged subregions of the light exit surface, have a different distance from the first reflective surfaces, corresponding to a distance between the corresponding subregions of the light outlet surface, onto which the third reflective surfaces assigned to the second reflective surfaces deflect the light beams to the central partial area of the light exit surface.

This means that the distance from the second and third reflective surfaces to the first reflective surfaces is greater, the further away that portion of the light exit surface onto which the second and third reflective surfaces deflect light rays is located from the central portion of the light exit surface. In other words, a light beam that strikes approximately the middle of the first and second reflective surfaces covers a path on its way from a first to a second reflective surface that is roughly the distance from the center of that part of the light exit surface on which the Light beam is deflected over the second and third reflection surfaces, corresponds to the center of the central portion of the light exit surface.

The redistribution section can be designed as a flat plate, the light exit surface then having a straight longitudinal extension. In this case, the various reflection surfaces are preferably flat and have an inclination of 45 ° with respect to the light rays impinging on them, so that the light rays striking the reflection surfaces are each deflected by 90 ° by the reflection surfaces. However, it would also be conceivable for the redistribution section to be designed to be curved about an axis parallel to the direction of the light beams deflected by the third reflection surfaces in the direction of the corresponding subregions of the light exit surface. In this case, it might be necessary to choose the inclination of the flat reflective surfaces slightly different from 45 ° in order to ensure that the light rays hitting a reflective surface really all hit the subsequent reflective surface in the beam path or the corresponding sub-area of the light exit surface . It would also be conceivable to design the reflection surfaces not flat, but rather slightly curved, in order to better achieve this goal.

It would also be conceivable to arrange several of the transparent component arrangements next to one another, so that the end faces of the redistribution section of the component arrangements directly adjoin one another. In this way, a particularly elongated light exit surface can be implemented, which is composed of the light exit surfaces of the individual transparent component arrangements. The redistribution sections of a plurality of transparent component arrangements arranged next to one another can also be designed in one piece.

The object on which the present invention is based is also achieved by a lamp module of the type mentioned at the outset, which has a transparent lamp module according to the invention Has component arrangement. Such a lamp module can be used to generate an elongated light distribution with a greater horizontal than vertical extent. The light distribution is used in particular to implement any lighting function, for example a daytime running light, a flashing light, a position or parking light, a rear light, a brake light or a reversing light. Depending on the desired lighting function, light sources are used that emit light of a certain color (e.g. white, yellow, red). It would also be conceivable to use light sources that can each emit light of different colors (e.g. so-called multicolor or RGB LEDs) so that they emit light of a certain color depending on a corresponding control of the light source in order to achieve a desired light distribution . In this way, it is possible to use one and the same transparent component arrangement or one and the same lamp module to implement different lamp functions (for example daytime running lights and flashing lights).

Figur 1

eine schematische Darstellung für eine Umverteilung eines Strahlenbündels mit rundem Querschnitt auf eine langgezogene Lichtaustrittsfläche;

Figur 2

eine schematische Darstellung der Umverteilung in drei Schnitten aus Figur 1;

Figuren 3a bis 3c

ein bevorzugtes Ausführungsbeispiel einer erfindungsgemäßen transparenten Bauteilanordnung in verschiedenen Ansichten;

Figur 4

eine perspektivische Ansicht der Bauteilanordnung aus den Figuren 3a bis 3c von schräg hinten;

Figur 5

eine perspektivische Ansicht der Bauteilanordnung aus den Figuren 3a bis 3c von schräg oben und vorne;

Figur 6

eine perspektivische Ansicht von zwei nebeneinander angeordneten Bauteilanordnungen aus den Figuren 3a bis 3c von schräg oben und vorne;

Figur 7

einen anhand von Beispielstrahlen eingezeichneten schematisch dargestellten Verlauf der Lichtstrahlen in dem Umverteilungsabschnitt der erfindungsgemäßen transparenten Bauteilanordnung; und

Figur 8

eine Beleuchtungseinrichtung mit einem erfindungsgemäßen Leuchtenmodul, das seinerseits eine erfindungsgemäße transparenten Bauteilanordnung umfasst.

Further features and advantages of the present invention are explained in more detail below with reference to the figures. Show it:

Figure 1

a schematic representation for a redistribution of a beam with a round cross-section on an elongated light exit surface;

Figure 2

a schematic representation of the redistribution in three sections Figure 1 ;

Figures 3a to 3c

a preferred embodiment a transparent component arrangement according to the invention in different views;

Figure 4

a perspective view of the component arrangement from FIG Figures 3a to 3c from diagonally behind;

Figure 5

a perspective view of the component arrangement from FIG Figures 3a to 3c from diagonally above and in front;

Figure 6

a perspective view of two juxtaposed component arrangements from the Figures 3a to 3c from diagonally above and in front;

Figure 7

a schematically illustrated course of the light beams in the redistribution section of the transparent component arrangement according to the invention, drawn in using example beams; and

Figure 8

a lighting device with a lamp module according to the invention, which in turn comprises a transparent component arrangement according to the invention.

The features of the present invention described below can also be essential to the invention individually or in a different combination than that described here and shown in the figures. The present invention is not restricted to the exemplary embodiments described here.

In Figure 8 is a lighting device of a Motor vehicle in the form of a headlight designated in its entirety with the reference number 1. Of course, the lighting device 1 could also be a rear light of a motor vehicle. The headlight 1 is arranged and fastened in the front area of the body of a motor vehicle. A lamp module of a motor vehicle lamp according to the invention is arranged in the headlight 1. Of course, the lamp with the lamp module can also be arranged separately from the headlight 1 as an independent component with its own housing at the front, rear or side in or on a motor vehicle. For example, it would be conceivable to arrange the light as a raised third brake light in or on a trunk lid or behind a rear window of a motor vehicle. Furthermore, the light could be arranged as a retrofittable daytime running light in the area of a front spoiler or on a bumper of the motor vehicle.

In detail, the headlight 1 has a housing 2 which is preferably made of plastic. In a light exit direction 3, the housing 2 has a light exit opening 4 which is closed by means of a transparent cover plate 5. The cover 5 is made of glass or plastic. On the cover plate 5, optically effective elements (for example prisms or cylinder lenses) can be arranged at least in some areas in order to scatter the light passing through (so-called diffusion plate). However, it is also conceivable that the cover plate 5 is designed without such optically effective elements (so-called clear plate).

A light module 6 is arranged in the interior of the housing 2. The light module 6 can be used to generate any Serve headlight function or part thereof. In particular, the light module 6 can serve to generate a low beam distribution, a high beam distribution, a fog light distribution or any adaptive light distribution or a part thereof. Furthermore, a further light module 7 can be arranged in the housing 2. This is used, for example, to generate a further headlight function. However, it would also be conceivable that the light modules 6, 7 together generate the intended headlight function. For example, the light module 7 could generate a low beam basic light distribution with a relatively wide spread and a horizontal light-dark border. The light module 6 could then generate a low-beam spot light distribution which, compared to the low-beam basic light distribution of the light module 7, is relatively highly concentrated and has an asymmetrical light-dark boundary on the top. The asymmetrical light-dark boundary shows a higher course on the own traffic side than on the opposite traffic side. A superposition of the basic light distribution and the spot light distribution results in a conventional low beam distribution. Of course, it is conceivable that in addition to the light modules 6, 7, further light modules for realizing other headlight functions are arranged in the headlight housing 2. In addition, only one light module, for example the light module 6 without the light module 7, can be arranged in the headlight housing 2.

Finally, at least one motor vehicle light with a light module 8 according to the invention is also arranged in the housing 2. The light module 8 is used to generate at least one light function, for example a flashing light, a position light, a daytime running light, etc. The lamp module 8 according to the invention is described below with reference to FIG Figures 1 to 7 explained in more detail.

The lamp module 8 is shown in various perspective views in Figures 4 and 5 shown. It comprises a light source 10, which is designed, for example, as a half-space radiator, in particular as a light-emitting diode (LED). The light-emitting diode 10 comprises at least one LED chip, which in a main emission direction 11 emits light, preferably with a Lambertian emission characteristic, into a 180 ° half-space.

The luminaire module 8 also comprises a transparent component arrangement, which is designated in its entirety by the reference symbol 12. This in turn includes a coupling-in section 13 which is designed to couple the light emitted by the light source 10 in the main emission direction 11 into the component arrangement 12. The coupling-in section 13 preferably has a rotationally symmetrical shape, an axis of rotation preferably being congruent with the main emission direction 11 of the light by the light source 10.

Furthermore, the component arrangement 12 has a bundling section 14 which is designed to bundle the coupled-in light into a beam 19 with light beams running parallel to one another. The bundle of rays 19 bundled by the bundling section 14 preferably has a circular cross section (cf. Figure 1 ). The bundling section 14 can have a rotationally symmetrical shape, with an axis of rotation preferably congruent with the main emission direction 11 of the light by the light source 10 is. The bundling section 14 is, for example, together with the coupling section 13, part of a TIR ancillary optics (cf. Figure 2 ). However, a lens, in particular a plano-convex lens, could also be used as an auxiliary lens.

In Figure 2 the coupling section 13 and the bundling section 14 are designed as a single integral component. In particular, this component is designed in the form of a so-called front lens or TIR (total internal reflection) lens made of a transparent material, in particular PC, PMMA or PMMI. The optical attachment 13, 14 has a coupling-in section 13 with a recess 13a and a plurality of light entry surfaces 13b, 13c in the area of this recess 13a. The light source 10 radiates its light mainly into this recess 13a and onto the entry surfaces 13b, 13c. A bottom of the recess 13a extends at least in regions perpendicular to the main emission direction 11 of the light source 10 and forms a first light entry surface 13b. This serves at the same time to focus the light impinging on it, so that, strictly speaking, the surface 13b is both part of the coupling-in section 13 and part of the bundling section 14. On a side opposite the first entry surface 13b, the optical attachment 13, 14 has a first light exit surface 14b. The first entry surface 13b and / or the first exit surface 14b can be curved in the manner of a lens. Light rays which enter the ancillary optics 13, 14 via the first entry surface 13b and exit the latter again via the first exit surface 14b are bundled, in particular collimated, by means of refraction.

Furthermore, an ancillary optics 13, 14 comprises at least one second light entry surface 13c, which extends through a wall of the Ancillary optics 13, 14 is formed which delimits the cylindrical or frustoconical recess 13a. Light beams emitted by the light source 10 obliquely to the main emission direction 11 strike this entry surface 13c and enter the ancillary optics 13, 14 laterally. There they first encounter totally reflective boundary surfaces 14a of the optical attachment 13, 14 and are deflected by these onto at least one second light exit surface 14c of the optical attachment 13, 14. This exit surface 14c extends at least around part of the circumference of the first exit surface 14b. The light beams reflected by the boundary surfaces 14a emerge via the second exit surface 14c parallel to the light beams exiting via the first exit surface 14b from the ancillary optics 13, 14. Light rays that enter the ancillary optics 13, 14 via the second entry surface 13c and exit it again via the second exit surface 14c are bundled, in particular collimated, by means of refraction and total reflection.

In addition, the component arrangement 12 comprises a redistribution section which is designated in its entirety by the reference symbol 15. The redistribution section 15 has several facets 20, 21, 22 (cf. Figures 4 and 5 ), which are formed, in each case a partial area 18 of the beam 19 (cf. Figure 1 ) on a sub-area 16 of a light exit surface 17 (cf. Figures 1 , 2 , 5 and 7th ) of the lamp module 8. The redistribution section 15 preferably has a longitudinal extension along the light exit surface 17 and perpendicular to the main emission direction 11 of the light source 10. In Figure 4 a dashed line 14d is drawn in, which symbolizes an imaginary dividing plane between the bundling section 14 and the redistribution section 15. It understands that, in the case of a one-piece configuration of the transparent component arrangement 12, the light exit surfaces 14b, 14c of the bundling section 14 (cf. Figure 2 ) are also only imaginary and within the transparent solid body of the transparent component arrangement 12 only form a transition for the light rays from the bundling section 14 into the redistribution section 15. In Figure 2 the redistribution section 15 is only shown schematically. However, as mentioned, it can also be an integral part of the shown integral component (front lens 13, 14), or it can be formed separately from it.

The Figures 3a to 3c 12 show various other views of the transparent component assembly 12. Figure 3a shows a view obliquely from above (against the direction of the y-axis in Figure 5 ), Figure 3b a view from diagonally below and Figure 3c a view from diagonally above.

The light emitted from the light exit surface 17 in the light exit direction 3 (cf. Figure 5 ) is used to implement the lighting function of the motor vehicle light. The individual subregions 16 of the light exit surface 17 lie next to one another, so that an elongated light distribution with a greater horizontal than vertical extension results. At least some of the facets, in the example shown here the facets 22, are assigned a certain partial area 16 of the light exit surface 17, onto which these facets 22 deflect light. In the context of the present invention, it is proposed that the facets 20, 21, 22 of the redistribution section 15 deflect the light incident on them by means of reflection (and not by refraction) and that the redistribution section 15 is formed by the individual reflective facets 20, 21, 22 partial areas 18 of the beam 19, which are divided by a subdivision of a cross section of the beam 19 (cf. Figure 1 ) by means of horizontal and / or vertical cutting planes 23, 24, which run parallel to the mutually parallel light rays of the bundle of rays 19 and parallel or perpendicular to each other, onto the subregions 16 of the light exit surface 17 assigned to them. The parallel course of the light beams of the beam 19 to one another is maintained during the entire deflection in the redistribution section 15. This is explained in detail below. The reflective facets 20, 21, 22 of the redistribution section 15 deflect light incident on them, preferably by means of total reflection.

The transparent component arrangement 12 is designed in the form of a transparent solid body made of plastic, for example PC, PMMA or PMMI. According to the embodiment of the transparent component arrangement 12 shown here in the figures, the coupling-in section 13, the bundling section 14 and the redistribution section 15 are designed as a single integral component, i.e. the TIR ancillary optics 13, 14 and the redistribution section 15 are designed in one piece. This has the advantage that the bundling section 14 does not first have to be positioned and held relative to the redistribution section 15 during the assembly of the light module 8 or the transparent component arrangement 12. In addition, the one integral component has advantages in production, for example in the context of an injection molding process, since the entire component arrangement can be produced in one step. In the in the Figures 2-5 and 7th shown Embodiment, the reflective facets of the redistribution section 15 include first reflective surfaces 20, second reflective surfaces 21 and third reflective surfaces 22. The first reflective surfaces 20 are formed, the light rays from at least some of the partial areas 18 of the beam 19 in the direction of the second reflective surfaces 21, that is perpendicular to the Main emission direction 11 of the light source 10 and deflect along the longitudinal extension of the redistribution section 15. The deflected light beams propagate parallel to one another in the transparent material of the redistribution section 15 in the direction of the second reflective surfaces 21. The second reflective surfaces 21 are formed, light beams deflected by the first reflective surfaces 20 in the direction of the corresponding third reflective surfaces 22, i.e. parallel (but opposite) the main emission direction 11 of the light source 10 and perpendicular to the direction of the light beams deflected by the first reflection surfaces 20. The light beams deflected by the second reflective surfaces 21 propagate parallel to one another in the transparent material of the redistribution section 15. The third reflective surfaces 22 are designed to direct the light beams deflected by the second reflective surfaces 21 in the direction of the corresponding subregions 16 of the light exit surface 17, i.e. perpendicular to the Main emission direction 11 of the light source 10, perpendicular to the direction of the light beams deflected by the first reflection surfaces 20 and perpendicular to the direction of the light beams deflected by the second reflection surfaces 21. A corresponding configuration of the redistribution section 15 and the course of the light beams through the redistribution section 15 are shown in FIG Figure 7 for an exemplary drawn light beam 25, which strikes the various reflection surfaces 20, 21, 22 approximately in the middle. The light beam 25 is one of many parallel light beams of the beam 19 which has been formed in the focusing section 14. The beam 25 initially strikes a first reflective surface 20 in the redistribution section 15. The reflective surfaces 20 are arranged in the redistribution section 15 in such a way that light rays from almost all subregions 18 of the beam 19 hit them. Only the light rays of a sub-area 18.1 of the beam 19, which the redistribution section 15 deflects onto a central sub-area 16.1 of the light exit surface 17, impinge directly on at least one of the third reflection surfaces 22.1 (cf. Figure 4 ), without hitting one of the first reflection surfaces 20 or one of the second reflection surfaces 21 beforehand. This is explained in detail below.

According to the invention, two first reflective surfaces 20 are provided which are at right angles to one another, each first reflective surface 20 being oriented at an angle α of 45 ° with respect to the parallel light rays entering the redistribution section 15. An edge 20c, along which the two reflective surfaces 20 are in contact with one another, runs approximately centrally through the coupled-in beam 19, so that the subregions 18.2a, 18.3a, 18.4a, 18.5a, 18.6a of the beam 19 focus on the first Hit the reflection surface 20a and the subregions 18.2b, 18.3b, 18.4b, 18.5b, 18.6b of the beam 19 hit the other first reflection surface 20b. The first reflection surfaces 20 therefore deflect a large part of the light beams that have entered the redistribution section 15 90 ° so that they propagate along the longitudinal extent of the redistribution section 15 until they hit one of the second reflection surfaces 21.

Such a second reflection surface 21 is shown in FIG Figure 7 drawn in as an example. According to the invention, the reflective surface 21 is also oriented at an angle β of 45 ° with respect to the light beams deflected by the first reflective surface 20 (and thus generally also with respect to the main emission direction 11 of the light source 10). It again deflects the light beam 25 by 90 °, so that it is now directed against the main emission direction 11 of the light source 10. According to the invention, the second reflective surfaces 21 have a precisely defined size, so that only those light rays of the beam 19 hit them that were previously deflected by one of the first reflective surfaces 20 and that originate from a specific sub-area 18 of the beam 19. This specific sub-area 18 can be one of the sub-areas 18.2a, 18.2b, 18.3a, 18.3b, 18.4a, 18.4b, 18.5a, 18.5b, 18.6a, 18.6b, the light of which enters a decentralized sub-area 16.2a, 16.2b , 16.3a, 16.3b, 16.4a, 16.4b, 16.5a, 16.5b, 16.6a, 16.6b, the light exit surface 17 is deflected. Only those light beams propagating in the redistribution section 15 fall on a certain second reflective surface 21, which were previously deflected by one of the first reflective surfaces 20 and which, on their way along the longitudinal extension of the redistribution section 15, did not previously fall on another one further ahead in the beam path arranged second reflective surface 21 are hit and which also do not run past the second reflective surface 21 in order to then hit another second reflective surface 21 arranged further back in the beam path. By the shape and size of the second reflective surfaces 21 can therefore be determined from which of the partial areas 18 of the beam 19 light rays strike the other second reflective surfaces 21 arranged downstream in the beam path. In the Figure 7 The second reflective surface 21 shown directs the incident light beam 25 in the direction of the third reflective surface 22, which here is arranged above the second reflective surface 21 assigned to it. A light bundle from any partial area 18 is reflected on the reflection surfaces 20 and 21. In relation to the arrangement 12, the parallel bundles of rays pass through different planes and are deflected by the reflection surfaces 22 into a common plane in which they emerge from the arrangement 12 via the exit surface 17.

Such a third reflection surface 22 is shown in FIG Figure 7 drawn in as an example. According to the invention, the third reflective surface 22 also has an inclination of γ = 45 ° with respect to the light beams deflected by the second reflective surface 21 (and thus generally also with respect to the main emission direction 11 of the light source 10). However, their inclination about an axis that runs parallel to the light beams deflected by the second reflective surface 21 is rotated by 90 ° with respect to the inclination of the first and second reflective surfaces 20, 21. The third reflective surface 22 again deflects the incident light beam 25 by 90 ° um, but both perpendicular to the direction of the light beams deflected by the first reflective surface 20 and perpendicular to the direction of the light beams deflected by the second reflective surface 21. The light beam 25 deflected by the third reflective surface 22 strikes a specific sub-area 16 of the light exit surface 17 assigned to the third reflective surface 22. The light beams deflected by the third reflection surfaces 22 propagate in a plane above or below the plane in which the light beams propagate along the longitudinal extension of the redistribution section 15.

The beam path described is also in Figure 2 in the sections 2 and 3 for the light rays of the subregions 18.6a, 18.6b (section 2) and 18.5a, 18.5b (section 3). The light beams emitted by the light source 10 enter the transparent component arrangement 12 via the coupling section 13 and are bundled by the bundling section 14 to form the beam 19 with largely parallel light beams. In this illustration, the light rays arrive from right to left into the redistribution section 15, where they first hit the first reflection surfaces 20. The first reflection surfaces 20 deflect the light beams upwards or downwards with respect to the plane of the drawing. In the section 2, the light beams deflected by the first reflective surfaces 20 then strike the second reflective surfaces 21.6a, 21.6b assigned to the partial areas 18.6a, 18.6b of the beam 19. These then deflect the incident light rays to the right with respect to the plane of the drawing, so that they strike the third reflection surfaces 22.6a, 22.6b assigned to the second reflection surfaces 21.6a, 21.6b. These deflect the light beams out of the plane of the drawing, so that they strike the corresponding subregions 16.6a, 16.6b of the light exit surface 17. In the section 3, the light beams deflected by the first reflective surfaces 20 then strike the second reflective surfaces 21.5a, 21.5b assigned to the subregions 18.5a, 18.5b of the beam 19. These direct the incident light rays then to the right, so that they hit the third reflection surfaces 22.5a, 22.5b assigned to the second reflection surfaces 21.5a, 21.5b. These in turn deflect the light beams out of the plane of the drawing, so that they strike the corresponding subregions 16.5a, 16.5b of the light exit surface 17.

Light rays from a sub-area 18.1 of the beam 19, which the redistribution section 15 deflects onto a central sub-area 16.1 of the light exit surface 17, impinge directly on at least one third reflective surface 22.1 assigned to the sub-area 18.1 of the beam 19, without first hitting one of the first reflective surfaces 20 or one of the second To meet reflection surfaces 21. The path of these light rays is in Figure 7 shown by way of example on the basis of two further light beams 26. It can be clearly seen that this third reflection surface 22.1 deflects the incident light rays directly in the direction of the central partial area 16.1 of the light exit surface 17. This third reflection surface 22.1 also has an inclination of δ = 45 ° with respect to the light rays that have entered the redistribution section 15 (and thus generally also with respect to the main emission direction 11 of the light source 10), but it is perpendicular to the remaining third reflection surfaces 22.i (i> 1). Furthermore, the inclination is opposite (rotated by 90 ° around an axis perpendicular to the main emission direction 11 of the light source 10 and parallel to the longitudinal extent of the redistribution section 15) to the inclination of the remaining third reflection surfaces 22.2a, 22.2b, 22.3a, 22.3b, 22.4a, 22.4b, 22.5a, 22.5b, 22.6a, 22.6b. This third reflection surface 22.1 is, however, in the same horizontal plane in the redistribution section 15 arranged like the other third reflection surfaces.

The beam path described for the light beams of sub-area 18.1 of beam 19 is also shown in FIG Figure 2 shown in section 1. The light beams emitted by the light source 10 enter the transparent component arrangement 12 via the coupling section 13 and are bundled by the bundling section 14 to form the beam 19 with largely parallel light beams. With respect to the plane of the drawing, the light rays arrive from right to left into the redistribution section 15, where they strike the third reflection surface 22.1 assigned to the partial area 18.1 of the beam 19. This deflects the light beams out of the plane of the drawing, so that they strike the corresponding central partial area 16.1 of the light exit surface 17.

In the figures shown, the redistribution section 15 has a flat longitudinal extent, so that a straight, elongated light exit surface 17 results. However, it would also be conceivable for the redistribution section 15 to be designed to be curved about an axis which runs parallel to the direction of the light beams deflected by the third reflection surfaces 22 in the direction of the corresponding subregions 16 of the light exit surface 17. As a result, a curved, elongated light exit surface 17 can be produced, the course of which follows, for example, an edge region of the housing 2 of the lighting device 1 or through which special design aspects can be implemented.

It can be seen from the figures that all of the reflective surfaces 20, 21, 22 are flat. It would be however, it is also conceivable that the reflective surfaces 20, 21, 22 are arched. Furthermore, it would be conceivable that the reflection surfaces 20, 21, 22 are not all inclined at a 45 ° angle with respect to the incident light rays (or with respect to the main emission direction 11 of the light source 10), but rather individual or all reflection surfaces 20, 21, 22 in are inclined at a different angle. In this way it could be ensured, for example, that the light beams propagating in the redistribution section 15 hit the reflective surfaces 21, 22 arranged downstream in the beam path if the redistribution section 15 is curved.

In Figure 6 a further embodiment of the invention is shown in which several of the above-described and in FIGS Figures 3 to 5 shown transparent component arrangements 12 are arranged side by side. In the example, two identically designed transparent component arrangements 12.1, 12.2 are arranged next to one another in such a way that their light exit surfaces 17.1, 17.2 form a single, particularly elongated light exit surface. Front sides of the redistribution sections 15.1, 15.2 directly adjoin one another. The component arrangements 12.1, 12.2 arranged next to one another are preferably designed as a common integral component. The component arrangements 12.1, 12.2 arranged next to one another do not necessarily have to be of identical design. It would also be conceivable, for example, that one of the component arrangements 12.1, 12.2 has a redistribution section 15 bent around the light exit direction 3 or that the component arrangements 12.1, 12.2 are bent differently.

Claims (15)

1. Transparent component arrangement (12) of a luminaire module (8), the component arrangement (12) comprising

   - a coupling section (13) adapted to couple light emitted from a light source (10) in a main radiation direction (11) into the component arrangement (12),

   - a bundling section (14) which is adapted to focus the light coupled in into a beam (19) with light rays running parallel to one another, and

   - a redistribution section (15) with a plurality of facets (20, 21, 22) which are adapted to each direct a partial region (18) of the beam (19) onto a partial region (16) of a light exit surface (17) of the luminaire module (8), the partial regions (16) of the light exit surface (17) lying next to one another and thus resulting in an elongated light distribution with a greater horizontal than vertical extension, and wherein at least some of the facets (22) are each assigned a specific partial region (16) of the light exit surface (17) onto which these facets (22) deflect light, wherein the facets (20, 21, 22) of the redistribution section (15) deflect the light incident on them by means of reflection, and in that the redistribution section (15) is adapted, by the individual reflecting facets (20, 21, 22) to direct partial areas (18) of the beam of rays (19), which result from a subdivision of a cross-section of the beam of rays (19) by means of horizontal and vertical sectional planes (23, 24) which run parallel to the light rays of the beam of rays (19) running parallel to one another and parallel or perpendicular to one another, onto the partial areas (16) of the light exit surface (17) respectively assigned to them, the parallel course of the light rays of the beam (19) to one another being maintained during the entire deflection in the redistribution section (15), the reflecting facets (20, 21, 22) of the redistribution section (15) comprising first reflecting surfaces (20) and second reflecting surfaces (21), wherein two first reflecting surfaces (20) are arranged at a right angle to each other, wherein each first reflecting surface (20) is oriented at an angle α of 45° with respect to the parallel light rays entering the redistribution section (15), characterized in that such a second reflecting surface (21) is also oriented at an angle β of 45° with respect to the light rays deflected by a first reflecting surface (20) and in turn deflects the light rays (25) by 90° so that they are now directed against the main radiation direction (11) of the light source (10), and in that the second reflecting surfaces (21) have a precisely defined size so that only those light rays of the beam (19) impinge on them, which have previously been deflected by one of the first reflecting surfaces (20) and which originate from a given sub-region (18) of the beam (19), and in that the reflecting facets (20, 21, 22) of the redistribution section (15) comprise third reflecting surfaces (22) which also have an inclination of γ = 45° with respect to the light rays deflected by the second reflecting surface (21) and which in turn deflect incident light rays (25) by 90°, but both perpendicularly to the direction of the light rays deflected by the first reflecting surface (20) and perpendicularly to the direction of the light rays deflected by the second reflecting surface (21), so that light rays (25) deflected by the third reflecting surface (22) impinge on a specific partial area (16) of the light exit surface (17) assigned to the third reflecting surface (22).
2. Transparent component arrangement (12) according to claim 1, characterised in that the coupling section (13) and the bundling section (14) are formed as a single integral component separate from the redistribution section (15).
3. Transparent component arrangement (12) according to claim 1, characterised in that the coupling section (13), the bundling section (14) and the redistribution section (15) are formed as a single integral component.
4. Transparent component arrangement (12) according to one of claims 1 to 3, characterised in that the beam (19) bundled by the bundling section (14) has a circular cross-section.
5. Transparent component arrangement (12) according to one of claims 1 to 4, characterised in that the coupling section (13) has a rotationally symmetrical shape, an axis of rotation being congruent with the main direction of radiation (11) of the light through the light source (10) .
6. Transparent component arrangement (12) according to one of claims 1 to 5, characterized in that the bundling section (14) has a rotationally symmetrical shape, an axis of rotation being congruent with the main direction of radiation (11) of the light through the light source (10) .
7. Transparent component arrangement (12) according to one of claims 1 to 6, characterised in that the redistribution section (15) has a longitudinal extension along the light exit surface (17) and perpendicular to the main radiation direction (11) of the light source (10) .
8. Transparent component arrangement (12) according to one of claims 1 to 7, characterised in that the reflecting facets (20, 21, 22) of the redistribution section (15) deflect light incident thereon by means of total reflection.
9. Transparent component arrangement (12) according to one of the claims 1 to 8, characterised in that the first reflecting facets (20) are adapted to deflect light rays from at least some of the partial areas (18) of the beam (19) in the direction of the second reflecting facets (21), perpendicular to a main radiation direction (11) of the light source (10) and along a longitudinal extension of the redistribution portion (15), wherein the second reflecting surfaces (21) are adapted to deflect light rays deflected by the first reflecting surfaces (20) towards the corresponding third reflecting surfaces (22), parallel to the main radiation direction (11) of the light source (10) and perpendicular to the direction of the light rays deflected by the first reflecting surfaces (20), and wherein the third reflecting surfaces (22) are adapted to deflect light rays deflected by the second reflecting surfaces (21) towards the corresponding partial regions (16) of the light exit surface (17), perpendicular to the main emission direction (11) of the light source (10), perpendicular to the direction of the light rays deflected by the first reflecting surfaces (20) and perpendicular to the direction of the light rays deflected by the second reflecting surfaces (21).
10. Transparent component arrangement (12) according to claim 9, characterised in that the light rays of a partial region (18.1) of the beam of rays (19), the light of which is deflected by the redistribution section (15) onto a central partial region (16.1) of the light exit surface (17), are directed directly onto at least one of the third reflecting surfaces (22, 23, 24). 1), which deflect the light rays of the partial area (18.1) in the direction of the corresponding central partial area (16.1) of the light-emitting surface (17) without the light rays of the partial area (18.1) first striking one of the first reflecting surfaces (20) or one of the second reflecting surfaces (21).
11. Transparent component arrangement (12) according to claim 9 or 10, characterised in that the second reflection surfaces (21), which deflect the light rays propagating in the redistribution section (15) in the direction of the third reflection surfaces (22), have a different distance from the first reflection surfaces (21), corresponding to a distance of the corresponding partial areas (16) of the light exit surface (17) with respect to a central partial area (16.1) of the light exit surface (17) .
12. Transparent component arrangement (12) according to one of claims 9 to 11, characterised in that the third reflection surfaces (22), which deflect the light rays coming from the respective second reflection surfaces (21) in the direction of the corresponding partial areas (16) of the light exit surface (17), have a different distance from the first reflection surfaces (21), corresponding to a distance of the corresponding partial areas (16) of the light exit surface (17) with respect to a central partial area (16.1) of the light exit surface (17) .
13. Transparent component arrangement (12) according to one of claims 1 to 12, characterized in that the redistribution section (15) is adapted curved about an axis parallel to the direction of the light rays deflected by the third reflecting surfaces (22) in the direction of the corresponding partial areas (16) of the light-emitting surface (17).
14. Luminaire module (8) of a motor vehicle luminaire, the luminaire module (8) comprising a light source (10) for emitting light in a main radiation direction (11) and a transparent component arrangement (12) for bundling and redistributing the light emitted by the light source (10) to partial areas of a light exit surface (17) of the luminaire module (8) to produce an elongated light distribution with a greater horizontal than vertical extension, characterised in that the transparent component arrangement (12) is adapted according to one of claims 1 to 13.
15. Luminaire module (8) according to claim 14, characterised in that the light source (10) comprises a semiconductor light source, in particular a light-emitting diode (LED).

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