EP3461687B1 - Light guide arrangement for a motor vehicle light and motor vehicle light provided with such a light guide arrangement - Google Patents

Description

The present invention relates to a light guide arrangement of a motor vehicle lamp according to the preamble of claim 1. Such a light guide arrangement is from EP 3 179 157 A1 known. From the FR 3 042 258 a light guide arrangement with at least two light sources is known, which essentially illuminate the same light exit surface of the light guide.

The invention also relates to a motor vehicle light for generating a number of light functions. The lamp comprises a housing with a light exit opening directed in a light exit direction, which is closed by means of a transparent cover plate. Furthermore, the lamp in the housing comprises at least two different lamp functions associated semiconductor light sources for emitting light and a light guide arrangement for bundling (collimating) of the Light sources emitted light and for emitting the focused light to generate at least one of the lighting functions.

In the case of motor vehicle lights, attempts are increasingly being made to implement different signal or light functions from an identical light exit surface or a common optical system. One speaks here of multifunctional lights. If functions of different colors, such as white daytime running lights and yellow indicators, are combined, this optical system must produce legally legal light distributions from two different, spatially separate light sources. As a rule, at least one white and one yellow light-emitting diode (LED) are used here. In the case of optical systems that are based on a defined focal point, this is a not inconsiderable problem.

So-called prompter reflectors, attachment optics or so-called slit lights are mentioned here as examples. SlitLights are for example from the U.S. 9,557,024 known. Depending on the focal length of the system, both LEDs cannot be placed so close to the focal point at the same time that a light distribution with acceptable optical efficiency can be generated. Even more serious, however, is the influence of the LEDs that are out of focus on the homogeneity of the appearance of the luminaire when it is switched on. Since the lighting functions represent an essential design element in the motor vehicle, the illumination of a specific light exit surface should be as homogeneous as possible. If LEDs are outside the focal point, homogeneous illumination is usually no longer possible.

Based on the prior art described, the present invention is based on the object Light guide arrangement or a motor vehicle light of the type mentioned in such a way to design and develop that an optically efficient multifunction light is realized on the basis of a transparent light guide arrangement. In addition, the homogeneity of the appearance of the light for all light functions should be comparable to that of a single-function light.

This object is achieved with the features of claim 1. Based on the light guide arrangement of the type mentioned at the outset, it is proposed to solve this problem that a light redistribution section is arranged between the entry section and the exit section. In addition, the entry section includes means for coupling and collimating light that was emitted by at least two separate semiconductor light sources, so that the light from the two light sources is present at a transition to the redistribution section as at least two collimated light beams arranged next to one another or one on top of the other. Each of the light bundles includes only light from one of the light sources. The redistribution section includes totally reflecting partial surfaces of boundary surfaces of the light guide. The partial surfaces are designed and arranged in the light guide in such a way that they split the at least two collimated light bundles arranged next to one another or one on top of the other into a plurality of collimated partial light bundles and rearrange the partial light bundles in such a way that partial light bundles with Alternating light from one light source with partial light bundles with light from at least one other light source. To solve the problem is also a motor vehicle light with such proposed light guide arrangement according to the invention.

The semiconductor light sources are in the form of light-emitting diodes (LEDs), for example. An LED can include one or more LED chips. The LED chips in an LED can emit light of the same color or different colors. The LEDs of the motor vehicle lamp can also emit light of the same color or different colors. If the LEDs emit light of different colors, different lighting functions of different colors can be generated with the motor vehicle light. The light emitted by one or both light sources is coupled into the entry section of the light guide and collimated. Many options are known from the prior art for this purpose, so that the bundling or collimating of light coupled into a light guide will not be discussed in detail here. It is crucial that at least two collimated light beams are present at the transition between the entry section and the redistribution section of the light guide.

With the help of the redistribution section downstream of the entry section, the collimated light bundles are divided into several collimated partial light bundles and redistributed with regard to their position relative to one another within the light guide with the aim of bringing about an illumination of the light exit surface of the light guide that is as homogeneous as possible for an observer.

One idea on which the present invention is based is to first collimate the light emitted by two LEDs in different beam paths. However, the collimating optics can be part of the same component. Only the collimated beams are mixed so that both LEDs can illuminate a light exit surface to the same extent without the parallelism of the beam bundles being lost. The illumination of the light exit surface resembles thin stripes or a checkerboard pattern, which is perceived by an observer as a uniformly luminous surface if the luminous "strips" or "fields" are sufficiently small.

Advantages over optical systems in which at least one semiconductor light source is located outside the focal point can clearly be seen in the optical efficiency and homogeneity of the illumination of the exit surface. In addition, known components for focusing the light emitted by the LEDs and for decoupling the light from the light guide can be used in the motor vehicle light according to the invention.

A preferred embodiment is characterized in that the totally reflecting partial surfaces of the boundary surfaces of the light guide are designed and arranged in the light guide in such a way that they split the two collimated light bundles arranged next to one another or one above the other into two collimated partial light bundles.

It is also preferred that a thickness of the light guide in the first direction at the transition between the entry section and the redistribution section is just as great as at a transition between the redistribution section and the exit section.

It is further preferred that the redistribution section is designed such that at least one partial light beam of at least one light beam without redistribution by the Redistribution section arrived.

A further preferred configuration is characterized in that the redistribution section has on a first boundary surface a first partial surface which is inclined with respect to the first boundary surface and which is arranged and designed in the redistribution section in such a way that part of a light beam from the entry section strikes it, which forms a first partial light beam, and it deflects this partial light beam essentially transversely to the direction of light propagation, so that it impinges on a second partial surface of the redistribution section, which is formed on a second boundary surface opposite the first boundary surface.

It is also preferred that the second partial surface is inclined with respect to the second boundary surface and is arranged and configured in the redistribution section in such a way that it deflects the first partial light bundle originating from the first partial surface essentially in the direction of light propagation.

It is further preferred that the first partial surface and/or the second partial surface are arranged at an angle of 45° with respect to the first boundary surface or the second boundary surface.

A further preferred embodiment is characterized in that the redistribution section has a depression on a first interface or on a second interface opposite the first interface with two third and fourth sub-areas running obliquely to one another and obliquely with respect to the corresponding interface.

Weiter ist bevorzugt, dass die dritten und vierten Teilflächen der Vertiefung beide in dem gleichen Winkel α < 45° bezüglich der entsprechenden Grenzfläche schräg stehen.It is also preferred that the light guide has a thickness in the first direction and the indentation has a length in the direction of light propagation and a depth Δh in the first direction and that the third and fourth partial surfaces of the indentation are inclined at an angle α with respect to the corresponding boundary surface, where for the deepening applies: $$\mathrm{l}=\frac{2\cdot \mathrm{H}-\mathrm{<figure-callout\; id="2"\; label="\Delta \; H\; tan"\; filenames="imgf0002.png"\; state="\{\{state\}\}">\Delta </figure-callout>}\mathrm{H}}{\tan }.$$

It is further preferred that the third and fourth sub-areas of the indentation are both inclined at the same angle α<45° with respect to the corresponding interface.

Another preferred configuration is characterized in that the third partial surface of the recess is directed in the direction of the entry section and is arranged and configured in the redistribution section in such a way that it deflects impinging partial light beams onto the opposite boundary surface of the deflection section, which deflects them in the direction of the fourth partial surface the deepening deflects.

It is also preferred that the third and fourth partial surfaces of the recess are arranged and configured in the redistribution section in such a way that the partial light beams impinging on the third partial surface, after being deflected by the third partial surface, the opposite boundary surface and the fourth partial surface, turn in the direction of light propagation in the Light guides propagate, but the location of the Partial light beam is changed relative to each other at least in the first direction.

It is further preferred that the depression is formed in the first boundary surface of the light guide and the third partial surface of the depression, which is directed in the direction of the entry section, is arranged and formed in the redistribution section in such a way that a part of the first light bundle from the entry section forms a second partial light bundle , and a part of the second light beam from the entrance section impinges on them, forming a third partial light beam.

A further preferred configuration is characterized in that the depression is formed in the second boundary surface of the light guide and the third partial surface of the depression, which is directed in the direction of the entry section, is arranged and formed in the redistribution section in such a way that the first partial light bundle is separated from the second partial surface and a Part of a light beam from the entrance section strikes them, which forms a fourth partial light beam.

It is also preferred that the exit section has a first deflection surface that is inclined with respect to the boundary surfaces of the light guide, which is designed and arranged in the exit section in such a way that all partial light beams from the redistribution section impinge on it and it deflects the partial light beams in the direction of second deflection surfaces that are configured in such a way are formed and arranged in the exit section such that all the partial light beams deflected by the first deflection surface impinge on them and they deflect the partial light beams in the direction of the light exit surface.

It is also preferred that the totally reflecting partial surfaces of the boundary surfaces of the light guide are designed and arranged in the redistribution section in such a way that partial light bundles with light from one light source also appear on the light exit surface in a direction running transversely to the first direction with partial light bundles with light from the other Alternate light source.

Another preferred embodiment is characterized in that the totally reflecting partial surfaces are designed and arranged in the redistribution section such that partial light bundles with light from one light source alternate on the light exit surface in a chessboard pattern with partial light bundles with light from the other light source.

A preferred embodiment of the motor vehicle light is characterized in that its light guide arrangement is designed in accordance with one of the preceding embodiments.

Figur 1

einen Längsschnitt durch einen Lichtleiter der erfindungsgemäßen Lichtleiteranordnung gemäß einer ersten bevorzugten Ausführungsform;

Figur 2

den Lichtleiter aus Figur 1 mit beispielhaft eingezeichneten Strahlverläufen;

Figur 3

einen Längsschnitt durch einen Lichtleiter der erfindungsgemäßen Lichtleiteranordnung gemäß einer zweiten bevorzugten Ausführungsform mit beispielhaft eingezeichneten Strahlverläufen;

Figur 4a

einen Querschnitt durch einen Lichtleiter der erfindungsgemäßen Lichtleiteranordnung an einem Übergang zwischen einem Lichteintrittsabschnitt des Lichtleiters und einem Umverteilungsabschnitt gemäß einer bevorzugten Ausführungsform;

Figur 4b

eine Draufsicht auf eine Lichtaustrittsfläche eines Austrittsabschnitts eines Lichtleiters der erfindungsgemäßen Lichtleiteranordnung gemäß einer ersten bevorzugten Ausführungsform;

Figur 4c

eine Draufsicht auf eine Lichtaustrittsfläche eines Austrittsabschnitts eines Lichtleiters der erfindungsgemäßen Lichtleiteranordnung gemäß einer zweiten bevorzugten Ausführungsform;

Figur 5

einen Längsschnitt durch einen Lichtleiter der erfindungsgemäßen Lichtleiteranordnung gemäß einer dritten bevorzugten Ausführungsform mit beispielhaft eingezeichneten Strahlverläufen; und

Figur 6

eine erfindungsgemäße Kraftfahrzeugleuchte gemäß einer bevorzugten Ausführungsform.

Advantageous configurations of the present invention can be found in the dependent claims. Further features and advantages of the present invention are explained in more detail below with reference to the figures. Show it:

figure 1

a longitudinal section through a light guide of the light guide arrangement according to the invention according to a first preferred embodiment;

figure 2

off the light guide figure 1 with ray paths shown as examples;

figure 3

a longitudinal section through a light guide of the light guide arrangement according to the invention according to a second preferred embodiment with beam paths drawn in by way of example;

Figure 4a

a cross section through a light guide of the light guide arrangement according to the invention at a transition between a light entry section of the light guide and a redistribution section according to a preferred embodiment;

Figure 4b

a top view of a light exit surface of an exit section of a light guide of the light guide arrangement according to the invention according to a first preferred embodiment;

Figure 4c

a plan view of a light exit surface of an exit section of a light guide of the light guide arrangement according to the invention according to a second preferred embodiment;

figure 5

a longitudinal section through a light guide of the light guide arrangement according to the invention according to a third preferred embodiment with beam paths drawn in by way of example; and

figure 6

a motor vehicle light according to the invention according to a preferred embodiment.

In figure 6 a motor vehicle light according to the invention is denoted by the reference numeral 2 in its entirety. The lamp 2 shown is, for example, a rear, side or front lamp. The lamp 2 is used to generate several different lamp functions. In the one shown For example, the lamp 2 includes a housing 4 with a light exit opening 8 directed in a light exit direction 6 , which is closed by means of a transparent cover plate 10 . Inside the housing 4, a lighting module 12 is arranged, which in figure 6 is shown only schematically. The lamp module 12 comprises at least two semiconductor light sources for emitting light, which are assigned to different lamp functions of the lamp 2 . Furthermore, the lamp module 12 comprises a light guide arrangement according to the invention for bundling the light emitted by the light sources and for emitting the bundled light to generate at least one of the lamp functions. Structure and operation of the light guide arrangement are based on the Figures 1 to 5 explained in more detail.

In the Figures 1 to 3 and 5 longitudinal sections through various embodiments of a plate-shaped light guide 20 of a light guide arrangement according to the invention are shown. The light guides 20 are used to implement two or more different lighting functions. In this context, plate-shaped means that the light guide 20 has a relatively large extent in the x and z direction, but a comparatively small extent in the y direction. The light guide 20 is made of an optically transparent material, preferably a plastic material, such as PC or PMMA. It can be manufactured simply, inexpensively and with dimensional accuracy using an injection molding process. The light guide 20 has, in particular, two opposing base surfaces 22, 24, which do not have to be flat, but have steps or, for example, can be curved around an axis running into the plane of the drawing. The bases 22, 24 run--apart from a few surface deformations--preferably parallel to each other.

The light guide 20 is functionally subdivided in a propagation direction 26 of light within the light guide 20 into a light entry section 28, a subsequent light redistribution section 30 and a subsequent light exit section 32 (cf. figure 1 ). A sectional plane at the transition between the entry section 28 and the redistribution section 30 is denoted by reference numeral 34 . At the same time, this sectional plane represents an exit of the entry section 28 . The entrance section 28 includes means (not shown) for coupling and collimating light emitted by two separate semiconductor light sources (not shown). The semiconductor light sources are preferably in the form of light-emitting diodes (LEDs). Various options are known in the prior art for coupling light from a semiconductor light source into a plate-shaped light guide and for collimating the coupled light, so that they will not be discussed in any more detail here. As one possibility, just an example should be mentioned here, in which two so-called SlitLights, as shown in figure 3 the U.S. 9,557,024 are known, are stacked on top of each other, with each of the SlitLights then coupling in and bundling the light from a light source. A large number of other options for coupling in and collimating the light are also known and can be used for the light guide arrangement according to the invention. What is decisive is that after the light from the light sources has been coupled in and collimated at the transition 34 to the redistribution section 30, the light from the two light sources should border one another as two next to one another or one on top of the other arranged collimated light beams A, B (cf. Figure 4a ). Each of the light bundles A, B includes only light from one of the light sources. The exit section 32 includes a light exit surface 38 through which at least part of the light coupled into the light guide 20 exits.

The entry section 28 may be formed integrally with the remainder of the light guide 20 or as a separate piece. In the latter case, the light guide 20 includes a light entry surface through which the collimated light bundles of the light sources enter. For example, it would be conceivable that the light exit surfaces of two SlitLights stacked on top of each other, as shown in figure 3 the U.S. 9,557,024 are known, are arranged opposite the light entry surface of the light guide 20, so that the two collimated light bundles emerging from the SlitLights enter the light guide 20 as efficiently as possible via the light entry surface.

In order to implement an optically efficient multifunctional light 2 based on a light guide arrangement with a transparent light guide 20 with a particularly homogeneous appearance for all light functions, the invention proposes that the light redistribution section 30 be a deflection structure made up of totally reflecting partial surfaces 40, 42, 44, 46 of the boundary surfaces 22 , 24 of the light guide 20, which are designed and arranged in the light guide 20 in such a way that they each split the two collimated light bundles A, B arranged next to one another into a plurality of collimated partial light bundles A1, A2; B1, B2 split and the partial light bundles A1, A2; Sort B1, B2 in such a way that in a first direction y of a cutting plane xy running transversely to the direction of light propagation 26, for example at the transition 36, partial light bundles A1, A2 with light from one light source with partial light bundles B1, B2 alternate with light from the other light source (cf. Figures 4b and 4c ).

The functioning of the light guide arrangement according to the invention is based on the Figures 1 to 4 explained in more detail. The starting point is two collimated beams of rays A, B of the LEDs, which propagate in a transparent component in the z-direction (light propagation direction 26). On average, these are parallel and directly above one another in the y-direction. In figure 2 shows how a part A1 of the first beam A is reflected at the partial surface 40 of the boundary surface 24 by total internal reflection. On the partial surface 42 of the boundary surface 22, the partial beam A1 is reflected directly above the beam B, likewise by means of total reflection, back into the original direction of propagation 26. The partial beam A1 is then reflected by total reflection on the partial surfaces 44, 46 of a recess 48 formed in the boundary surface 22 and on the opposite boundary surface 24 such that it now runs directly above a third partial beam B1 of the second beam bundle B. The partial beam B1 passes through the redistribution section 30 through the redistribution structures without deflection or total reflection at one of the partial surfaces 40, 42, 44, 46.

The fourth partial beam B2 of the second beam bundle B is reflected by total reflection on the partial surfaces 44, 46 of the depression 48 and on the opposite boundary surface 24 in such a way that it now runs above the partial beam A1.

The light guide 22 has according figure 1 in the y-direction has a thickness h, and the recess has in the Light propagation direction 26 has a length l and in the y-direction a depth Δh. The third and fourth partial surfaces 44, 46 of the depression 48 are at an angle α obliquely with respect to the corresponding boundary surface 22 (cf. Figures 1, 2 and 5 ) or 24 (cf. figure 3 ). The following preferably applies to the configuration of the recess 48: $$\mathrm{l}=\frac{2\cdot \mathrm{H}-\Delta \mathrm{H}}{\tan \left(2\cdot \mathrm{a}\right)}.$$

In this way, a new arrangement of the partial beams A1, A2, B1, B2 is generated in the y-direction on the light exit surface 38. The original arrangement B2 over B1 over A2 over A1 transitions to B2 over A1 over B1 over A2.

In figure 4 shows how this lamp 2 or the light exit surface 38 of the light guide 20 would appear in a viewing direction opposite to the z-direction. At the transition 34 in front of the redistribution section 30, the beam bundles A, B are clearly separated from one another, below A above B (cf. Figure 4a ). At the transition 36 after the redistribution section 30 and thus also on the light exit surface 38 of the light guide 20, the partial beam bundles can be seen, each with half the height ABAB (cf. Figure 4b ).

In order to now generate a checkerboard pattern on the light exit surface 38 (cf. Figure 4c ), can be offset in the x-direction from the cut figure 2 one inside figure 3 shown, mirrored arrangement of the partial surfaces 44, 46 of the recess 48 may be formed. In this case, the partial beam A1 no longer reflected after the second partial surface 42 . The partial beam B2 is not reflected on any part of the surface, but passes through the light guide 20 without being deflected Figure 4b complementary pattern BABA emerges. Due to the periodic arrangement of the deflection structure Figure 2 and Figure 3 a checkerboard pattern can be generated on the light exit surface 38 in this way. Referring to Figure 4c For example, the light distribution pattern is shown in a vertical section 50 through the redistribution structures figure 2 and the light distribution pattern in a vertical section 52 through the redistribution structures figure 3 generated.

The light guide 20 of the light guide arrangement according to the invention can in principle be realized in a transparent component with a focusing optic and a decoupling optic. An example of an exit section 32 with a decoupling region is shown in FIG figure 5 shown. The decoupling can be achieved via reflective or transmissive surfaces, which also produce a desired light distribution. In figure 5 a first deflection surface 54 is provided in the exit section 32 in the beam path, which is inclined with respect to the boundary surfaces 22, 24 of the light guide 20, which is designed and arranged in the exit section 32 in such a way that all partial light bundles A1, A2, B1, B2 from the redistribution section 32 they strike and it deflects the partial light bundles A1, A2, B1, B2 in the direction of second deflection surfaces 56, which are designed and arranged in the exit section 32 in such a way that all partial light bundles A1, A2, B1, B2 deflected by the first deflection surface 54 strike them and they deflect the partial light bundles A1, A2, B1, B2 in the direction of the light exit surface 38.

The position of the partial beam bundles B2 via A1 via B1 via A2 at the transition 36 from the redistribution section 30 to the exit section 32 is retained even after deflection at the deflection surfaces 54, 56 and is also present at the light exit surface 38. There, the partial beam bundles A1, A2, B1, B2 are only slightly expanded in the y-direction.

In summary, it can therefore be stated that the present invention relates to a plate light guide 20 for realizing two or more different lamp functions and to a motor vehicle light 2 with such a plate light guide 20 . The lighting functions are generated with the light of different separate light sources. On the light exit surface 38 of the light guide 20, there is a particularly uniform appearance for all lamp functions of the lamp 2. The various lamp functions can be generated simultaneously or at different times. For example, a daytime running light and a flashing light can be generated simultaneously, with the light source possibly being dimmed to generate the daytime running light. Furthermore, a rear light and a brake light or a rear light and a blinking light can also be generated at the same time. Of course, only one of the light sources can also be operated, so that the light guide 20 temporarily produces only one lighting function. At least two collimated light bundles A, B are present in the entry section 28 of the light guide 20 at the transition 34 to the redistribution section 30 . These can each have the same height in the y-direction of the sectional plane (xy) running transversely to the light propagation direction 26 . However, it would also be conceivable for the collimated light bundles A, B to have different heights.

The redistribution section 30 has differently oriented redistribution structures in the form of totally reflecting partial surfaces 40, 42, 44, 46 of the boundary surfaces 22, 24 of the light guide 20, through which, on the one hand, the collimated light bundles A, B are divided into a plurality of collimated partial light bundles A1, A2, B1, B2 divided and on the other hand, the partial light bundles A1, A2, B1, B2 are rearranged within the light guide or their position relative to each other. If the light sources emit light of different colors, the rearranging of the partial light bundles A1, A2, B1, B2 by means of the rearranging structures ensures that the different colors hit the light exit surface 38 in small areas, so that the different illumination is hardly noticed by a viewer .

The sorting structures are defined surface deformations (partial surfaces 40, 42, 44, 46) of the boundary surfaces 22, 24 of the light guide 20, at which part of each light bundle A, B is deflected in such a way that the height of the resulting partial light bundles A1, A2, B1 , B2 is reduced, but the number of partial light bundles A1, A2, B1, B2 is increased compared to the number of light bundles A, B. If, for example, only two light sources are provided, which couple light into the light guide 20, the height of the partial light bundles A1, A2; B1, B2 versus the height of the corresponding light beam A; B and halve the number of partial light bundles A1, A2; Double B1, B2. The sorting structures consist, for example, of changes in the thickness of the light guide plate 20, the light guide plate 20 itself having the same thickness in the direction of light propagation 26 before and after the redistribution section 30. The resort structures allow for at least one Partial light bundles B1, A2; B2 pass through the light guide 20 unchanged. Due to the different orientation of the sorting structures, the light bundles A, B can be sorted in different directions (cf. Figure 4c ).

Claims (15)

1. Light guide arrangement of a motor vehicle light (2), comprising a substantially plate-shaped light guide (20) which is functionally divided in a light propagation direction (26) within the light guide (20) into a light entry section (28) and a subsequent light exit section (32), wherein the entry section (28) comprises means for coupling and collimating light emitted by at least one semiconductor light source, so that the light from the at least one light source is present as at least one collimated light beam at an output (34) of the entry section (28), and the exit section (32) comprising a light exit surface (38) through which at least part of the light coupled into the light guide (20) emerges, characterized in that a light redistribution section (30) is arranged between the entry section (28) and the exit section (32), in that the entry section (28) comprises means for coupling and collimating light emitted by at least two separate semiconductor light sources, so that at a transition (34) to the redistribution section (30) the light of the at least two light sources is present as at least two collimated abutting light beams (A, B) arranged in juxtaposition to each other or one above the other, each of the light beams (A, B) comprising light from only one of the light sources, and in that the redistribution section (30) comprises totally reflecting partial surfaces (40, 42, 44, 46) of boundary surfaces (22, 24) of the light guide (20), which are designed and arranged in the light guide (20) in such a way that they divide the at least two abutting collimated light beams (A, B) arranged in juxtaposition to each other or one above the other into a plurality of collimated partial light beams (A1, A2, B1, B2) respectively, and re-sort the partial light beams (A1, A2, B1, B2) in such a way that partial light beams (A1, A2) with light from the one light source alternate with partial light beams (B1, B2) with light from the at least one other light source in a first direction (y) of the light exit surface (38).
2. Light guide arrangement according to claim 1, characterized in that the totally reflecting partial surfaces (40, 42, 44, 46) of the boundary surfaces (22, 24) of the light guide (20) are designed and arranged in the light guide (20) in such a way that they split the two collimated light beams (A, B) arranged adjacent to or above one another into two collimated partial light beams (A1, A2; B1, B2) in each case.
3. Light guide arrangement according to claim 1 or 2, characterized in that a thickness (h) of the light guide (20) in the first direction (y) at the transition (34) between the inlet section (28) and the redistribution section (30) is as large as at a transition (36) between the redistribution section (30) and the outlet section (32) .
4. Light guide arrangement according to one of claims 1 to 3, characterized in that the redistribution section (30) is designed in such a way that at least one partial light beam (A2, B1; B2) of at least one light beam (A, B; B) passes through the redistribution section (30) without redistribution.
5. Light guide arrangement according to any one of claims 1 to 4, characterized in that the redistribution section (30) has, on a first boundary surface (22), a first partial surface (40) which is oblique with respect to the first boundary surface (22) and which is arranged and formed in the redistribution section (30) in such a way that part of a light beam (A) from the entry section (28) impinges thereon, forming a first partial light beam (A1), and it deflects this partial light beam (A1) substantially transversely to the light propagation direction (26) so that it impinges on a second partial surface (42) of the redistribution section (30) which is formed on a second boundary surface (24) opposite the first boundary surface (22).
6. Light guide arrangement according to claim 5, characterized in that the second partial surface (42) is oblique with respect to the second boundary surface (24) and is arranged and formed in the redistribution section (30) in such a way that it redirects the first partial light beam (A1) originating from the first partial surface (40) substantially in the light propagation direction (26).
7. Light guide arrangement according to claim 5 or 6, characterized in that the first partial surface (40) and/or the second partial surface (42) are arranged at an angle of 45° with respect to the first boundary surface (22) and the second boundary surface (24), respectively.
8. Light guide arrangement according to any one of claims 1 to 7, characterized in that the redistribution section (30) has, on a first boundary surface (22) or on a second boundary surface (24) opposite the first boundary surface (22), a depression (48) with two third and fourth partial surfaces (44, 46) extending obliquely with respect to one another and obliquely with respect to the corresponding boundary surface (22; 24).
9. Light guide arrangement according to claim 8, characterized in that the light guide (20) has a thickness (h) in the first direction (y) and the depression (48) has a length (1) in the light propagation direction (26) and a depth (Δh) in the first direction (y), and in that the third and fourth partial surfaces (44, 46) of the depression (48) are oblique at an angle (α) with respect to the corresponding boundary surface (22; 24), where the following applies to the depression (48) : $$\mathrm{l}=\frac{2\cdot \mathrm{h}-\Delta \mathrm{h}}{\tan \left(2\cdot \mathrm{\alpha }\right)}.$$

   
10. Light guide arrangement according to claim 8 or 9, characterized in that the third and fourth partial surfaces (44, 46) of the depression (48) are both inclined at the same angle (α) < 45° with respect to the corresponding boundary surface (22; 24).
11. Light guide arrangement according to one of the claims 8 to 10, characterized in that the third partial surface (44) of the depression (48) is directed in the direction of the entry section (28) and is arranged and formed in the redistribution section (30) in such a way that it deflects incident partial light beams (A1, B2; A2, B1) onto the opposite boundary surface (24; 22) of the deflection section (20), which deflects them in the direction of the fourth partial surface (46) of the depression (48).
12. Light guide arrangement according to claim 11, characterized in that the third and fourth partial surfaces (44, 46) of the depression (48) are arranged and formed in the redistribution section (30) in such a way that the partial light beams (A1, B2; A2, B1) impinging on the third partial surface (44) are arranged and formed in the redistribution section (30) in such a way that the partial light beams (A1, B2; A2, B1) impinging on the third partial surface (44) after being deflected by the third partial surface (46), the opposite boundary surface (24; 22) and the fourth partial surface (46) again propagate in the light propagation direction (26) in the light guide (20), but the position of the partial light beams (A1, B2; A2, B1) relative to one another is changed at least in the first direction (y).
13. Light guide arrangement according to any one of claims 8 to 12, characterized in that the depression (48) is formed in the first boundary surface (22) of the light guide (20) and the third partial surface (44) of the depression (48) directed towards the entry section (28) is arranged and formed in the redistribution section (30) in such a way, that a part of the first light beam (A) from the entry section (28), which forms a second partial light beam (A2), and a part of the second light beam (B) from the entry section (30), which forms a third partial light beam (B1), impinge thereon.
14. Light guide arrangement according to claim 6 and one of claims 8 to 12, characterized in that the depression (48) is formed in the second boundary surface (24) of the light guide (20) and the third partial surface (44) of the depression (48) directed towards the entry section (28) is arranged and formed in the redistribution section (30) such, that the first partial light beam (A1) from the second partial surface (42) and a part of a light beam (B) from the entry section (30) impinge thereon, forming a fourth partial light beam (B2).
15. Motor vehicle lamp (2) for generating a plurality of lamp functions, comprising a housing (4) with a light exit opening (8) which is directed in a light exit direction (6) and is closed by means of a transparent cover pane (10), at least two semiconductor light sources, which are assigned to different lamp functions, for emitting light, and a light guide arrangement for focusing the light emitted by the light sources and for emitting the focused light to generate at least one of the lamp functions, characterized in that the light guide arrangement is designed according to one of the preceding claims.

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