EP4343200A1 - Signal lighting device or lighting device for a motor vehicle headlight - Google Patents

Abstract

The invention relates to a signal lighting or lighting device (10) for a motor vehicle or for a motor vehicle headlight, comprising light sources (50) for emitting light beams and a light-guiding body (100) with two light exit surfaces (161, 162). The light guide body (100) comprises a beam splitter device (200) with a total reflection surface (201) which totally reflects part of the light beams (S1) striking it and deflects it in a direction (Z) that deviates from the main light guide propagation direction (X). the two light exit surfaces (162). The total reflection surface (201) has individual optical structures (202) which allow incident light rays (S1) to pass through to the other light exit surface (161). Each individual optical structure (202) is designed as a depression in the total reflection surface (201), with a depression, starting from an opening (2021) in the light-guiding body (100), from lateral surfaces extending into the light-guiding body (100). (2022, 2023, 2024; 2022, 2023, 2024a, 2024b), one of the lateral surfaces, the so-called base surface (2022), being oriented in such a way that light rays (S1) striking it pass through the base surface (2022) in the direction the first light exit surface (161), and each opening (2021) occupies a surface, the so-called opening surface, in the total reflection surface (201), an opening surface having an opening area A_B,i, the total reflection surface (201) has a total surface area A_tot, where A_tot includes the sum of all opening surface areas, and the first light exit surface (161 ) has a first surface area A₁ and the second light exit surface (162) has a second surface area A₂, and where Σ_iA_{applies B,i} /(A_ges - Σ_iA_B,i)/ = A<sub>1</sub >/A₂.

Description

• zumindest eine Lichtquelle zur Emission von Lichtstrahlen,
• einen der zumindest einen Lichtquelle zugeordneten Lichtleitkörper, wobei

der Lichtleitkörper einen Einkoppelabschnitt sowie einen Lichtaustrittsbereich umfasst, wobei über den Einkoppelabschnitt Lichtstrahlen, welche von der zumindest einen Lichtquelle emittiert werden, in den Lichtleitkörper eingekoppelt werden, sich in dem Lichtleitkörper fortpflanzen, und über den Lichtaustrittsbereich aus dem Lichtleitkörper austreten, wobei der Lichtaustrittsbereich zwei Lichtaustrittsflächen umfasst, wobei der Einkoppelabschnitt derart, z.B. in Form eines Kollimators, ausgebildet ist, dass die von der zumindest einen Lichtquelle emittierten Lichtstrahlen im Wesentlichen in eine Lichtleiter-Hauptausbreitungsrichtung ausgerichtet werden, und wobei der Lichtleitkörper eine Strahlteilvorrichtung umfasst, wobei die Strahlteilvorrichtung eine Totalreflexions-Fläche umfasst, welche zumindest einen Teil der auf sie auftreffenden Lichtstrahlen totalreflektiert, sodass diese Lichtstrahlen sich im Lichtleitkörper in einer Richtung abweichend von der Lichtleiter-Hauptausbreitungsrichtung fortpflanzen, und wobei die Totalreflexions-Fläche optische Einzel-Strukturen aufweist, die derart ausgebildet sind, dass zumindest ein Teil der auf eine Einzel-Struktur auftreffenden Lichtstrahlen über die Einzel-Struktur aus dem Lichtleitkörper austritt, über eine Wiedereintrittsfläche wieder in den Lichtleitkörper eintritt, wobei die wiedereingetretenen Lichtstrahlen zu einer der Lichtaustrittsflächen, der "ersten" Lichtaustrittsfläche, welche erste Lichtaustrittsfläche der Wiedereintrittsfläche gegenüber liegt, gelenkt werden, sodass diese Lichtstrahlen aus der ersten Lichtaustrittsfläche in einer Hauptabstrahlrichtung austreten können, und wobei die von der Totalreflexions-Fläche totalreflektierten Lichtstrahlen an einer Rückseite des Lichtleitkörpers totalreflektiert und dadurch zu der zweiten Lichtaustrittsfläche umgelenkt werden, wo die Lichtstrahlen in Richtung der Hauptabstrahlrichtung aus dem Lichtleitkörper austreten, wobei jede optische Einzel-Struktur als Vertiefung in der Totalreflexions-Fläche ausgebildet ist, wobei eine Vertiefung, ausgehend von einer Öffnung in dem Lichtleitkörper, von sich in den Lichtleitkörper hinein erstreckenden Mantelflächen begrenzt ist, wobei eine der Mantelflächen, die sogenannten Basisfläche, derart orientiert ist, dass auf sie auftreffende Lichtstrahlen durch die Basisfläche in Richtung der ersten Lichtaustrittsfläche durchtreten.The invention relates to a signal lighting or lighting device for a motor vehicle or for a motor vehicle headlight, comprising:

• at least one light source for emitting light rays,
• a light guide body assigned to the at least one light source, wherein

the light-guiding body comprises a coupling section and a light exit region, wherein via the coupling section light rays, which are emitted by the at least one light source, are coupled into the light-guiding body, propagate in the light-guiding body, and emerge from the light-guiding body via the light exit region, the light exit region having two light exit surfaces comprises, wherein the coupling section is designed such, for example in the form of a collimator, that the light beams emitted by the at least one light source are essentially aligned in a light guide main propagation direction, and wherein the light guide body comprises a beam splitter device, wherein the beam splitter device has a total reflection surface comprises, which totally reflects at least part of the light rays striking it, so that these light rays propagate in the light guide body in a direction deviating from the main light guide propagation direction, and wherein the total reflection surface has individual optical structures which are designed in such a way that at least one Part of the light rays striking an individual structure emerges from the light-guiding body via the individual structure, enters the light-guiding body again via a re-entry surface, the re-entered light rays traveling to one of the light exit surfaces, the "first" light exit surface, which first light exit surface is opposite the re-entry surface , are directed so that these light rays can emerge from the first light exit surface in a main radiation direction, and the light rays totally reflected from the total reflection surface are totally reflected on a back side of the light guide body and are thereby deflected to the second light exit surface, where the light rays are emitted in the direction of the main radiation direction emerge from the light-guiding body, each individual optical structure being designed as a recess in the total reflection surface, with a recess, starting from an opening in the light-guiding body, extending into the Light guide body is limited to lateral surfaces extending into it, one of the lateral surfaces, the so-called base surface, being oriented in such a way that light rays striking it pass through the base surface in the direction of the first light exit surface.

The invention further relates to a motor vehicle headlight comprising one or more such devices.

The invention also relates to a motor vehicle comprising one or more such devices and/or one or more motor vehicle headlights according to the invention.

With such a device, for example, two lighting functions, such as a daytime running light (TFL) and a direction indicator (FRA), can be implemented with a single light guide. The light guide body has two light exit surfaces, which form a common overall light exit surface.

For design reasons, specially shaped light exit surfaces are often desired. In the device in question, for example, two light exit surfaces are provided, which typically have different sizes and/or different shapes in terms of their shape.

For example, the two light exit surfaces lie one above the other, with one of the light exit surfaces, for example the upper one, being at the same height, i.e. opposite one or more light sources which can couple light into the light body.

A beam dividing device is provided in the light guide body, which divides the coupled-in light into the two light exit surfaces.

It has proven to be problematic to achieve a homogeneous appearance with such a device in the event that light emerges from both light exit surfaces at the same time. As a result, it is often necessary to choose a two-part design with two light guide bodies, which, however, runs counter to the frequent desire for a one-piece design.

It is accordingly an object of the invention to provide a solution for how a homogeneous appearance can be achieved for a device described at the outset.

This object is achieved with a device described at the beginning in that, according to the invention, each opening occupies a surface, the so-called opening surface, in the total reflection surface, an opening surface having an opening area A _B,i , the total reflection surface has a total surface area A _tot , where A _tot includes the sum of all opening surface areas, and the first light exit surface has a first surface area A ₁ and the second light exit surface has a second surface area A ₂ , and where applies $${\displaystyle {\sum }_{\mathrm{i}}{\mathrm{A}}_{\mathrm{b},\mathrm{i}}}/\left({\mathrm{A}}_{\mathrm{total}}-{\displaystyle {\sum }_{\mathrm{i}}{\mathrm{A}}_{\mathrm{b},\mathrm{i}}}\right)/={\mathrm{A}}_1/{\mathrm{<figure-callout\; id="2"\; label="A"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">A</figure-callout>}}_2$$

This general formula applies under the assumption that the depressions, ie in particular the openings of the depressions, can be of different sizes. It is preferably provided that the depressions, in particular their openings, are of the same size, i.e. have the same opening area. If n recesses are provided, the above formula is simplified to (A _B is the area of the opening area of a recess). $$\mathrm{n}{\mathrm{A}}_{\mathrm{b}}/\left({\mathrm{A}}_{\mathrm{total}}-\mathrm{n}{\mathrm{A}}_{\mathrm{b}}\right)={\mathrm{A}}_1/{\mathrm{A}}_2$$

Assuming a flat total reflection surface, the opening surfaces lie in the plane of the total reflection surface. As described below, the total reflection surface can be faceted, i.e. divided into several, preferably flat, facets. In this case, the opening surfaces lie in the plane of the respective facet, from which the depression extends into the light-guiding body.

With the embodiment according to the invention it is achieved that the light emitted by the light source or sources is divided according to the ratio of the size of the two light exit surfaces, so that it can be achieved that both light exit surfaces are irradiated with the same light intensity and thus have the same luminance or surface brightness.

It can be provided that one of the light exit surfaces, for example the lower light exit surface, has a larger surface area than the other, for example the upper light exit surface.

Advantageous embodiments of the invention are described in the dependent claims.

It can be provided that the further lateral surfaces are aligned essentially parallel to or in the direction of the light rays striking the individual structure, i.e. preferably parallel to the main radiation direction.

This ensures that these lateral surfaces do not influence the light rays hitting the recess or influence them as little as possible.

For example, it is provided that the depressions are pyramid-shaped, with a triangular opening, base surface and two lateral surfaces extending into the light-guiding body.

“Triangular” does not necessarily mean that the connecting lines between two corner points of the “triangle” have to be straight (in this respect it is a “modified” triangle). Likewise, “pyramid-shaped” means that the shape of the recess is similar but not necessarily identical to a pyramid, for example in that the lateral surfaces are not flat but curved.

It can be provided that the depressions are at least partially cylindrical.

In this case, the depression is a “cutout” in the light-guiding body or in the total reflection surface, with a lateral surface of the depression being designed in the form of a part of a cylinder jacket. This lateral surface or the height of the cylinder jacket runs essentially vertically.

The incident light rays are directed to the first light exit surface via this surface.

The depression is delimited by three further, preferably flat lateral surfaces, which "open" into the opening of the depression.

The base surface is preferably curved, in particular into the light-guiding body.

A surface normal to the base surface thus runs essentially parallel to the light guide main propagation direction, it being provided, for example, that the surface normal runs through the geometric center of the lateral surface and in particular runs normal to a tangential surface to the base surface at this center.

This curvature can achieve a splitting/expanding effect on an incident light bundle of parallel light rays S1, so that the light rays are evenly distributed over the light exit surface and this shines evenly brightly.

It can be provided that the other lateral surfaces are flat.

For example, in the case of a cylindrical depression, two lateral lateral surfaces and a bottom lateral surface are provided, which are preferably flat.

The flat lateral surfaces preferably extend parallel to the main direction of propagation of the light guide.

In particular, it can be provided that the individual structures are arranged uniformly and/or in rows and/or in columns distributed over the total reflection surface.

In this way, it can be achieved that the first light exit surface, but also the second light exit surface, are "supplied" with light from the light sources as completely as possible.

It can be provided that two or more light sources are provided, with the coupling section for one or more of the light sources being designed in such a way, for example in the form of a collimator, that the light rays emitted by each light source are essentially in the light guide's main propagation direction aligned are preferably arranged in a row, in particular laterally next to each other and transversely to the light guide main propagation direction.

Even in the case of only one light source, it is preferably provided that the coupling section is designed in the form of a collimator.

If there are several light sources, it can also be provided that two light sources are provided per collimator, for example one of a first color LED (e.g. like) and a second color LED (e.g. orange or yellow), whereby the device has two light functions, on the one hand the function of one Daytime running lights/position lights and on the other hand the function of a direction indicator can be realized. The homogeneity and beam characteristics are similar for both light functions - the entire light exit surface either lights up in the first color or flashes in the second color.

Furthermore, it can be provided that the light exit surfaces directly adjoin one another, in particular converge in a straight edge, and/or a light exit surface is arranged above the other light exit surface.

In particular, the two light exit surfaces can be inclined to one another at an angle greater than 90°, so that a V-shaped arrangement of the two light exit surfaces relative to one another results.

• entweder parallel zu einer ausgezeichneten Geraden verlaufen, oder
• schräg zu einer ausgezeichneten Geraden verlaufen,

wobei die ausgezeichnete Gerade eine Gerade ist, welche in einer Horizontalebene liegt und senkrecht zu der Licht-Hauptausbreitungsrichtung verläuft.It can be provided that when the light exit surfaces are cut with a horizontal surface, cutting lines result, assuming that the light exit surfaces are flat

• either run parallel to an excellent straight line, or
• run obliquely to form an excellent straight line,

where the distinguished straight line is a straight line which lies in a horizontal plane and runs perpendicular to the main direction of light propagation.

• parallel zu der ausgezeichneten Gerade oder
• schräg zu der ausgezeichneten Geraden ist.

Furthermore, it can be provided that a line of intersection resulting from a horizontal section through the total reflection surface, assuming that the total reflection surface is flat, either

• parallel to the distinguished straight line or
• is oblique to the distinguished straight line.

A total reflection surface arranged obliquely to the marked straight line enables the illumination of obliquely shaped light guide bodies or light exit surfaces - viewed in the main radiation direction - due to the light rays that are totally reflected in the corresponding direction.

It can be provided that the upper light exit surface is approximately at the same height as the one or more light sources, and / or preferably the total reflection surface is approximately at the same height as the at least one light source.

Furthermore, it can be provided that the total reflection surface runs transversely to the main direction of propagation of the light guide, and is preferably inclined in such a way that an upper edge region is closer to the at least one light source than a lower edge region.

It can be advantageous if the total reflection surface is divided into several facets, with facets lying laterally next to one another, and with the facets preferably each being rotated at an angle greater than 0° and less than 90° relative to the main direction of propagation of the light guide.

For example, each facet represents a substantially rectangular, flat surface. The normal vector on this surface can be divided into a horizontal component, which is in a substantially horizontal plane which contains the light guide main propagation direction X, and into a vertical component, which is in a vertical plane, which is normal to the plane parallel to the essentially horizontal plane.

Preferably, all facets are rotated by the same angle with respect to the main light guide propagation direction.

The angle mentioned above (twist angle) is the angle that the horizontal component of the normal vector makes to the main direction of propagation of the light guide.

For example, the facets lie next to each other in one or more rows one above the other.

The facets have the advantage over a non-faceted total reflection surface (i.e. with a continuous, flat total reflection surface) that with a second light exit surface running obliquely to the main direction of light guide propagation, the entire total reflection surface would have to be rotated by the said angle, which means that this surface is very large would require installation space.

It can be provided that the at least one light source is designed as an LED or comprises at least one LED.

Fig. 1

eine perspektivische Ansicht einer ersten Ausführungsform einer erfindungsgemäßen Vorrichtung,

Fig. 2

die Vorrichtung aus Figur 1 in einer Ansicht von oben,

Fig. 3

die Vorrichtung aus Figur 1 in einer schematischen Seitenansicht,

Fig. 4

einen schematischen Vertikalschnitt durch eine Vorrichtung aus Figur 1 parallel zu der Lichtleiter-Hauptausbreitungsrichtung,

Fig. 5

einen Detailausschnitt der Total-Reflexionsfläche der Vorrichtung aus Figur 1,

Fig. 6

eine Detailansicht einer Vertiefung in der der Total-Reflexionsfläche aus Figur 5,

Fig. 7

einen Horizontalschnitt durch die Vertiefung aus Figur 6,

Fig. 8

einen Vertikalschnitt parallel zu der Lichtleiter-Hauptausbreitungsrichtung durch die Vertiefung aus Figur 6,

Fig. 9

eine zweite Ausführungsform einer erfindungsgemäßen Vorrichtung in einer Ansicht von oben,

Fig. 10

einen schematischen Vertikalschnitt durch eine Vorrichtung aus Figur 9 parallel zu der Lichtleiter-Hauptausbreitungsrichtung,

Fig. 11

eine Detailansicht einer Vertiefung in der der Total-Reflexionsfläche der Vorrichtung aus Figur 11,

Fig.12

einen Horizontalschnitt durch die Vertiefung aus Figur 11, und

Fig. 13

einen Vertikalschnitt parallel zu der Lichtleiter-Hauptausbreitungsrichtung durch die Vertiefung aus Figur 11.

The invention is discussed in more detail below using exemplary figures. It shows

Fig. 1

a perspective view of a first embodiment of a device according to the invention,

Fig. 2

the device Figure 1 in a view from above,

Fig. 3

the device Figure 1 in a schematic side view,

Fig. 4

a schematic vertical section through a device Figure 1 parallel to the light guide main propagation direction,

Fig. 5

a detailed section of the total reflection surface of the device Figure 1 ,

Fig. 6

a detailed view of a depression in the total reflection surface Figure 5 ,

Fig. 7

a horizontal section through the depression Figure 6 ,

Fig. 8

a vertical section parallel to the light guide main propagation direction through the recess Figure 6 ,

Fig. 9

a second embodiment of a device according to the invention in a view from above,

Fig. 10

a schematic vertical section through a device Figure 9 parallel to the light guide main propagation direction,

Fig. 11

a detailed view of a depression in the total reflection surface of the device Figure 11 ,

Fig.12

a horizontal section through the depression Figure 11 , and

Fig. 13

a vertical section parallel to the main direction of light guide propagation through the recess Figure 11 .

The Figures 1 - 4 show a signal light or lighting device 10 for a motor vehicle or for a motor vehicle headlight. The device 10 comprises a light-guiding body 100 and light sources 50 assigned to it. The light-guiding body 100 has a coupling section 110 and a light exit region 160. Via the coupling section 110, light rays emitted by the light sources 50 can be coupled into the light-guiding body 100, where they propagate in the light-guiding body 100 and emerge from the light-guiding body 100 via the light exit region 160.

The coupling section 110 is designed in such a way, for example in the form of a collimator 111 or several collimators, that the light beams emitted by the at least one light source 50 are essentially aligned in a main fiber optic propagation direction X and are in the direction S1 parallel to the fiber optic main propagation direction X im Light guide body 100 propagate.

The light sources 50 are preferably arranged in a row, in particular laterally next to one another and transversely to the light guide main propagation direction X. The light sources are, for example, each designed as an LED or include at least one LED.

The light exit area 160 comprises two light exit surfaces 161, 162. The light exit surfaces 161, 162 directly adjoin one another and converge in a straight edge. A (first) light exit surface 161 lies above the other, second light exit surface 162. The two light exit surfaces 161, 162 are inclined to one another at an angle that is preferably greater than 90°, so that a V-shaped arrangement of the two light exit surfaces relative to one another results.

Preferably, as shown, the upper light exit surface 161 is approximately at the same height as the one or more light sources 50, and preferably the total reflection surface 201 is also approximately at the same height as the at least one light source 50.

It can be provided that one of the light exit surfaces, for example the lower light exit surface 162, has a larger surface area than the other, for example the upper light exit surface 161.

The light-guiding body 100 preferably consists of a transparent solid body, which is formed from a transparent material in which the coupled-in light can propagate.

The light guide body 100 has a beam splitter device 200, the beam splitter device 200 comprising a total reflection surface 201, which totally reflects at least part of the light rays S1 striking it, so that these totally reflected light rays S3 are reflected in the light guide body 100 in a direction Z deviating from the light guide body. Main direction of propagation X, especially downwards.

The total reflection surface 201 has individual optical structures 202, which are designed such that at least a portion of the light rays S1 striking an individual structure 202 emerge from the light guide body 100 via the individual structure 202 and re-enter via a re-entry surface 203 enters the light guide body 100, the re-entered light rays S2 being directed to the first light exit surface 161, which lies opposite the re-entry surface 203, so that these light rays emerge from the first light exit surface 161 in a main radiation direction Y (light rays S4).

The light exit surface 161 and/or the re-entry surface 203 can have optical structures or elements in order to direct the emerging light S4 in a desired direction (the main emission direction Y).

The light rays S3 that are totally reflected from the total reflection surface 201 are totally reflected again on a back side 101 of the light guide body 100 and are thereby deflected to the second light exit surface 162 light rays S3 ', where the light rays S5 also emerge from the light guide body 100 in the direction of the main radiation direction Y.

The second light exit surface 162 can in turn have optical structures in order to emit the light beams S5 in the desired direction and/or to ensure further homogenization of the emitted light.

In the Figures 1 - 4 , especially in Figure 2 It can be seen that in this exemplary embodiment the total reflection surface 201, but also the light exit surfaces 161, 162, run obliquely to the main light guide propagation direction X.

This can also be seen in the fictitious straight lines g50, g161, g162, g201. If the light exit surfaces 161, 162 are cut with a horizontal surface, the cutting lines g161, g162 result, assuming that the light exit surfaces 161, 162 are flat.

Furthermore, a so-called “distinct” straight line g50 can be seen, which lies in a horizontal plane and runs perpendicular to the main light propagation direction X. In the example shown, the row of light sources 50 runs parallel to the marked straight line g50.

In the present example, the two straight lines g161, g162 now run obliquely to the marked straight line g50 or obliquely to the main light propagation direction X.

The straight line g201, which results from a horizontal section through the total reflection surface 201, assuming that the total reflection surface 201 is flat, also runs obliquely to the marked straight line g50.

The straight lines g161, g162, g203 can be arranged parallel to one another, but can also run obliquely to one another.

In particular, it can be provided that the individual structures 202 are arranged uniformly and/or in rows and/or in columns over the total reflection surface 201, as shown in the figures, for example Figure 1 or Figure 5 is easy to see.

This can ensure that the first light exit surface 161, but also the second light exit surface 162, are "supplied" with light from the light sources as completely as possible.

At the hand of the Figures 1 - 8 In the embodiment described, it is further advantageously provided that the total reflection surface 201 is divided into several facets 201A, with facets 201A lying laterally next to one another, and with the facets preferably each at an angle greater than 0 ° and less than 90 ° against the light guide main propagation direction X are twisted. Preferably, all facets are rotated by the same angle with respect to the light guide main propagation direction X.

For example, each facet represents a substantially rectangular, flat surface. The normal vector on this surface can be converted into a horizontal component, which is in an im Substantially horizontal plane, which contains the light guide main propagation direction The angle mentioned above (twist angle) is the angle that the horizontal component of the normal vector makes to the main light guide propagation direction X.

For example, the facets lie next to each other in one or more rows one above the other. The facets have the advantage over a non-faceted total reflection surface (i.e. with a continuous, flat total reflection surface) that with a second light exit surface running obliquely to the main direction of light guide propagation, the entire total reflection surface would have to be rotated by the said angle, which means that this surface is very large would require installation space. Due to the faceting, it is not necessary to twist a large, continuous surface, but "only" a number/variety of surfaces are twisted, which take up little space due to their significantly smaller extent in the lateral direction compared to a continuous surface take.

Coming back to the individual optical structures 202 and looking at the Figures 5 - 8 It can be seen that each individual structure 202 is designed as a depression in the total reflection surface 201 or, precisely speaking, as a depression in the light-guiding body 100, starting from the total reflection surface 201.

Such a depression is, starting from an opening 2021 in the light-guiding body 100 (i.e. in the total reflection surface), delimited by lateral surfaces 2022, 2023, 2024 extending into the light-guiding body 100, one of the lateral surfaces, the so-called base surface 2022, being so is oriented so that light rays S1 striking it pass through the base surface 2022 in the direction of the first light exit surface 161.

In this example, the depressions 202 are "pyramid-shaped", with a triangular opening 2021 and base surface 2022 and the two further lateral surfaces 2023, 2024 which extend into the light-guiding body 100.

“Triangular” does not necessarily mean that the connecting lines between two corner points of the “triangle” have to be straight (in this respect it is a “modified” triangle). Likewise, “pyramid-shaped” means that the shape of the recess is similar but not necessarily identical to a pyramid, for example in that the lateral surfaces are not flat but curved.

The two further lateral surfaces 2023, 2024 are preferably flat and are aligned essentially parallel to or in the direction of the light beams striking the individual structure 202, i.e. preferably parallel to the main light guide propagation direction X.

This ensures that these lateral surfaces do not influence the light rays hitting the recess or influence them as little as possible.

Preferably, it is further provided that the base surface 2022, in particular into the light guide body 100, is curved. A surface normal to the base surface 2022 thus runs essentially parallel to the light guide main propagation direction

This curvature can (see Figure 7 ) a splitting/expanding effect on an incident light bundle of parallel light rays S1 can be achieved, so that the light rays are evenly distributed on the light exit surface 161 and this shines evenly brightly.

In a further embodiment according to Figures 9 - 13 , in which the fundamental connections are as in the case of the Figure 1 Discussed variant are given and are not repeated here, it can be provided that the depressions 202 are at least partially cylindrical. This design of the depressions 202 is advantageous here, since in this variant the excellent straight line g50 and the straight line g161 (see the explanations for these terms in the variant according to Figure 1 ) run parallel to each other ( Figure 9 ) and transverse and normal to the main fiber optic propagation direction X run. In this example, the lines g161, g162, g201 also run parallel to the marked line g50.

In this case, the depressions are each a "cutout" in the light-guiding body or in the total reflection surface, starting from the total reflection surface 201, with a lateral surface 2022 of the depression being designed in the form of part of a cylinder jacket. This lateral surface or the height of the cylinder jacket runs essentially vertically.

The incident light rays S1 are directed to the first light exit surface 161 via this lateral surface 2022. The lateral surface is preferably curved, in particular curved into the light guide body 100, so that as in the embodiment according to Figure 1 the light rays S1 are "scattered" accordingly (splitting/expanding effect on an incident light bundle of parallel light rays S1), so that the light exit surface 161 is subsequently illuminated more evenly.

The depression 202 is delimited by three further, preferably flat lateral surfaces 2023, 2024a, 2024b, which "open" into the opening of the depression. For example, these surfaces are two lateral lateral surfaces 2024a, 2024b and a bottom lateral surface 2023, which are preferably flat. These flat lateral surfaces 2023, 2024a, 2024b preferably extend parallel to the main radiation direction X.

In both embodiments it is provided that each opening 2021 occupies a surface, the so-called opening surface, in the total reflection surface 201, with an opening surface having an opening area A _B,i , the total reflection surface 201 having a total area A _tot , where A _tot contains the sum of all opening areas, and the first light exit surface 161 has a first area A ₁ and the second light exit surface (162) has a second area A ₂ , and where applies $${\displaystyle {\sum }_{\mathrm{i}}{\mathrm{A}}_{\mathrm{b},\mathrm{i}}}/\left({\mathrm{A}}_{\mathrm{total}}-{\displaystyle {\sum }_{\mathrm{i}}{\mathrm{A}}_{\mathrm{b},\mathrm{i}}}\right)/={\mathrm{A}}_1/{\mathrm{<figure-callout\; id="2"\; label="A"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">A</figure-callout>}}_2$$

This general formula applies under the assumption that the depressions, ie in particular the openings of the depressions, can be of different sizes. Preferably is it is provided that the depressions, in particular their openings, are the same size, i.e. have the same opening area. If n recesses are provided, the above formula is simplified to (A _B is the area of the opening area of a recess). $$\mathrm{n}{\mathrm{A}}_{\mathrm{b}}/\left({\mathrm{A}}_{\mathrm{total}}-\mathrm{n}{\mathrm{A}}_{\mathrm{b}}\right)={\mathrm{A}}_1/{\mathrm{<figure-callout\; id="2"\; label="A"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">A</figure-callout>}}_2$$

Assuming a flat total reflection surface, the opening surfaces lie in the plane of the total reflection surface. As described below, the total reflection surface can be faceted, i.e. divided into several, preferably flat, facets. In this case, the opening surfaces lie in the plane of the respective facet, from which the depression extends into the light-guiding body.

In the case of a faceted total reflection surface, the area A _total can be calculated by the sum of the areas of the facets 201A, starting from which areas the depressions 202 extend into the light-guiding body 100.

With the embodiment according to the invention it is achieved that the light emitted by the light source or sources is divided according to the ratio of the size of the two light exit surfaces, so that it can be achieved that both light exit surfaces are irradiated with the same light intensity and thus have the same luminance or surface brightness.

Claims (15)

Signaling or lighting device (10) for a motor vehicle or for a motor vehicle headlight, comprising: - at least one light source (50) for emitting light rays, - a light guide body (100) assigned to the at least one light source (50), wherein the light guide body (100) comprises a coupling section (110) and a light exit region (160), wherein light rays, which are emitted by the at least one light source (50), are coupled into the light-guiding body (100) via the coupling section (110), propagate in the light-guiding body (100), and via the light exit region (160) from the light-guiding body ( 100) exit, where the light exit area (160) comprises two light exit surfaces (161, 162), wherein the coupling section (110) is designed such, for example in the form of a collimator (111), that the light beams emitted by the at least one light source (50) are essentially aligned in a main light guide propagation direction (X), and wherein the light guide body (100) comprises a beam splitter device (200), wherein the beam splitter device (200) comprises a total reflection surface (201) which totally reflects at least part of the light rays (S1) striking it, so that these light rays (S3) are reflected in the light guide body (100) in a direction (Z) deviating from the light guide -propagate in the main direction of propagation (X), and wherein the total reflection surface (201) has individual optical structures (202) which are designed such that at least some of the light rays (S1) striking an individual structure (202) exit via the individual structure (202). exits the light-guiding body (100), enters the light-guiding body (100) again via a re-entry surface (203), wherein the re-entered light rays (S2) are directed to one of the light exit surfaces, the "first" light exit surface (161), which first light entry surface (161) lies opposite the re-entry surface (203), so that these light rays emerge from the first light exit surface (161) in one Main radiation direction (Y) can emerge, and wherein the light rays (S3) totally reflected by the total reflection surface (201) are totally reflected on a back side (101) of the light guide body (100) and are thereby deflected to the second light exit surface (162), where the light rays (S5) are directed in the direction of the main radiation direction (Y) emerge from the light guide body (100), wherein each individual optical structure (202) is designed as a depression in the total reflection surface (201), wherein a recess, starting from an opening (2021) in the light-guiding body (100), is delimited by lateral surfaces (2022, 2023, 2024; 2022, 2023, 2024a, 2024b) extending into the light-guiding body (100), wherein one of the lateral surfaces, the so-called base surface (2022), is oriented such that light rays (S1) striking it pass through the base surface (2022) in the direction of the first light exit surface (161), and where each opening (2021) occupies an area, the so-called opening area, in the total reflection area (201), an opening area having an opening area A _B,i , the total reflection area (201) having a total area A _tot , where A _total contains the sum of all opening areas, and the first light exit area (161) has a first area A ₁ and the second light exit area (162) has a second area A ₂ , and where applies $${\displaystyle {\sum }_{\mathrm{i}}{\mathrm{A}}_{\mathrm{b},\mathrm{i}}}/\left({\mathrm{A}}_{\mathrm{total}}-{\displaystyle {\sum }_{\mathrm{i}}{\mathrm{A}}_{\mathrm{b},\mathrm{i}}}\right)/={\mathrm{A}}_1/{\mathrm{A}}_2$$

Device according to claim 1, wherein the further lateral surfaces (2023, 2024; 2023, 2024a, 2024b) are aligned essentially parallel to or in the direction of the light rays striking the individual structure (202). Device according to claim 1 or 2, wherein the depressions (202) are pyramid-shaped, with a triangular opening (2021), base surface (2022) and two lateral surfaces (2023, 2024) extending into the light-guiding body (100). Device according to claim 1 or 2, wherein the depressions (202) are at least partially cylindrical. Device according to one of claims 1 to 4, wherein the base surface (2022), in particular into the light-guiding body (100), is curved, the other lateral surfaces (2023, 2024; 2023, 2024a, 2024b) preferably being flat, whereby for example, the flat lateral surfaces (2023, 2024) extend parallel to the light guide main propagation direction (X). Device according to one of the preceding claims, wherein the individual structures (202) are arranged uniformly and/or in rows and/or in columns distributed over the total reflection surface (201). Device according to one of the preceding claims, wherein two or more light sources (50) are provided, the coupling section (110) being designed in such a way, for example in the form of a collimator (111), for one or more of the light sources (50), in that the light beams emitted by each light source (50) are essentially aligned in the light guide main propagation direction (X), the light sources (50) preferably being arranged in a row, in particular laterally next to one another and transversely to the light guide main propagation direction (X). . Device according to one of the preceding claims, wherein the light exit surfaces (161, 162) directly adjoin one another, in particular converge in a straight edge, and / or a light exit surface (161) is arranged above the other light exit surface (162). Device according to one of claims 1 to 8, wherein when the light exit surfaces (161, 162) are cut with a horizontal surface, the cutting lines (g161, g162) resulting from the assumption that the light exit surfaces (161, 162) are flat are formed, • either run parallel to an excellent straight line (g50), or • run obliquely to the marked straight line (g50), where the distinguished straight line (g50) is a straight line which lies in a horizontal plane and runs perpendicular to the main light propagation direction (X). Device according to claim 9, wherein a cutting line (g201), which results from a horizontal section through the surface (201), either • parallel to the marked straight line (g50) or • is oblique to the marked straight line (g50). Device according to one of the preceding claims, wherein the upper light exit surface (161) is approximately at the same height as the one or more light sources (50), and/or wherein preferably the total reflection surface (201) is approximately at the same height as the at least one light source (50) is located. Device according to one of the preceding claims, wherein the total reflection surface (201) is divided into several facets (201A), wherein facets (201A) lie laterally next to one another, and wherein preferably the facets are each at an angle greater than 0° and less than 90° against the light guides -Main direction of propagation (X) are twisted. Device according to one of the preceding claims, wherein the at least one light source (50) is designed as an LED or comprises at least one LED. Motor vehicle headlights comprising one or more devices according to one of claims 1 to 13. Motor vehicle comprising one or more devices according to one of claims 1 to 13 and / or one or more motor vehicle headlights according to claim 14.

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