DE102021207138A1 - Lighting device for a motor vehicle - Google Patents

Abstract

The invention relates to a lighting device for a motor vehicle, comprising a multi-aperture projection unit (1) and a lighting device (2) with a plurality of lighting units (3) which can be controlled individually to vary their brightness and are provided for lighting the multi-aperture projection unit (1). . The lighting device is set up to generate a light projection in a predetermined projection area (PF) from the light of the lighting device (2). The multi-aperture projection unit (1) comprises an array of projection lenses (7), with each projection lens (7) being assigned an object structure which is projected through the respective projection lens (7) into the specified projection area (PF). The array of projection lenses (7) comprises a plurality of disjoint sub-arrays (TA) each consisting of one or more projection lenses (7), the associated object structures for projection lenses (7) between different sub-arrays (TA) being different and for projection lenses (7) in the same sub-array (TA) agree with each other. A lighting unit (3) of the lighting device (2) and a light-guiding unit (5) are assigned separately to each sub-array (TA), the light-guiding unit (5) directing light from the lighting unit (3) from a first end (5a) of the light-guiding unit (5). a second end (5b) of the light guide unit (5). The light guide unit (5) comprises a first optical unit (5-1) at its first end (5a) and a second optical unit (5-2) at its second end (5b), which are designed as a one-piece component. The light guide unit (5) is configured to bring about a homogenization of the light guided therein in the first optical unit (5-1), so that the light propagation direction (P) generated at one end of the first optical unit (5-1) and light entering the second optical unit (5-2) has a luminance and a color locus which are substantially constant across the end of the first optical unit (5-1) and which is guided in the second optical unit (5-2). To collimate light when exiting an exit surface (11) at the second end (5b) of the light guide unit (5) and to direct it exclusively to the respective sub-array (TA).

Description

The invention relates to a lighting device for a motor vehicle and a corresponding motor vehicle.

Lighting devices for motor vehicles are known which use a multi-aperture projection unit composed of an array of projection lenses in order to thereby produce light projections which are reproduced sharply over a large area. Such projections are often static and cannot be changed during operation.

In order to be able to change the light projection of the lighting device, a multi-aperture projection unit was developed, which is set up to generate a projection onto a predetermined projection area from the light of a lighting device with a number of lighting units. The lighting device includes an array of projection lenses. Each projection lens is assigned an object structure, which is projected through the respective projection lens into the predetermined projection area. Each projected object structure essentially covers the entire specified projection surface area. The light projection is thus a superimposition of equally sized projected individual images of the object structures, which are illuminated by the lighting device. The array of projection lenses comprises a plurality of disjoint sub-arrays, each consisting of one or more projection lenses, the associated object structures for projection lenses being different between different sub-arrays and for projection lenses in the same sub-array being the same.

A lighting unit of the lighting device and an optical funnel are assigned separately to each partial array. The latter directs light from the lighting unit from a first end of the optical funnel to a second end of the optical funnel. The optical funnel is configured to direct the light guided therein exclusively onto the respective subarray upon exit from an exit surface at the second end of the optical funnel and to bring about a homogenization of the light guided therein by means of scattering on its light-scattering surface. The result of the homogenization is that the light exiting at the exit surface has a luminance and a color locus that are essentially constant over the exit surface. Each projection lens of the multi-aperture projection unit is assigned separately to a converging lens in order to generate collimated light from the light falling on it from the lighting device, which has been homogenized by the optical funnel Projection lens is assigned.

The known lighting device with a multi-aperture projection unit enables an alternating display of projected images, but is highly complex and requires a comparatively large amount of installation space. In addition, the optical efficiency is poor.

It is the object of the invention to create a structurally and/or functionally improved lighting device for a motor vehicle with an improved multi-aperture projection unit, which has a high overall efficiency and requires only little installation space.

This object is achieved by a lighting device having the features according to patent claim 1 . Further developments of the invention are specified in the dependent claims.

The lighting device according to the invention is intended for a motor vehicle, the motor vehicle preferably being a car, but possibly also a truck or motorcycle. If interactions between the lighting device and components of the motor vehicle or the light projection generated for the motor vehicle are described below and in particular in the patent claims, this should always be understood to mean that the interaction occurs when the lighting device is arranged or installed in the motor vehicle.

The lighting device according to the invention comprises a multi-aperture projection unit and a lighting device with a plurality of lighting units which can be controlled individually to vary their brightness and are provided for lighting the multi-aperture projection unit. In other words, the lighting device includes a control device with which the lighting units can be controlled separately in order to vary their brightness. The variation in brightness also includes switching the lighting units on and off. The individual lighting units preferably each comprise one or more LEDs and/or laser diodes.

The multi-aperture projection unit is set up to generate a projection in a predefined projection area from the light of the lighting device, and it comprises an array of projection lenses, with each projection lens being assigned an object structure which is projected by the respective projection lens into the predefined projection area. In this case, each projected object structure preferably essentially covers the entire specified pro projection area. In other words, the light projection is a superimposition of equally sized projected individual images of the object structures that are illuminated by the lighting device.

The array of projection lenses comprises a plurality of disjoint sub-arrays, each consisting of one or more projection lenses, the associated object structures for projection lenses being different between different sub-arrays and for projection lenses in the same sub-array being the same. The number of projection lenses of the array can be chosen differently. The array preferably contains 100 to 200 projection lenses, but a larger or smaller number of projection lenses can also be provided. In addition, the number of projection lenses per sub-array can also be different; it is preferably between 5 and 10 lenses per sub-array.

Multi-aperture projection units, which cause individual projected object structures to be superimposed to form an overall projection, are known per se. The technology of the joint superimposition of object structures by means of a projection via an array of projection lenses is also used in the present lighting device according to the invention.

In the lighting device, each sub-array is separately assigned a lighting unit of the lighting device and a light-guiding unit. In this case, the light-guiding unit directs light from the lighting unit from a first end of the light-guiding unit to a second end of the light-guiding unit. In other words, each sub-array has a different lighting unit and a different light-guiding unit.

The light guide unit comprises a first optical unit at its first end and a second optical unit at its second optical end, the light guide unit being designed as a one-piece component. The light guide unit is configured to bring about a homogenization of the light guided therein in the first optical unit, so that the light generated in the direction of light propagation at one end of the first optical unit and entering the second optical unit has a luminance and a color point that are End of the first optical unit are essentially constant. The result of the homogenization is that the light generated at the end of the first optical unit has a luminance and a color point that are essentially constant over the “exit surface”. In other words, the light at the exit surface has a constant surface brightness with a fixed color or color mixture. The color location can be specified, for example, by coordinates in the CIE XYZ color space, which is known per se.

The light-guiding unit is further configured to collimate the light guided and homogenized in the second optical unit when it emerges from an exit surface at the second end of the light-guiding unit and to direct it exclusively onto the respective partial array.

As with the known lighting device, the lighting device according to the invention makes it possible for different images to be generated in accordance with the object structures of the respective partial array by means of the separate activation of the lighting units, as a result of which the projection can be flexibly adapted.

While the light mixing and collimation is divided between several components in the known lighting device, the invention provides for the color mixing and homogenization as well as the collimation to be implemented with a single component, namely the light guide unit. The implementation of the lighting device with a plurality of optical components, as described in the prior art, reduces the efficiency of the overall system, since part of the light is reflected at each interface. This effect is partially reduced by coatings (e.g. anti-reflective coatings) or by matching an intermediate medium (glass, water, etc.). However, these measures cannot fully compensate for the negative effects. The loss of efficiency results from reflections at the interface between two media with different refractive indices (e.g. air and glass). This results in a jump in the refractive index at the beginning and end of each component. If there are several optical components, these losses add up and affect the efficiency of the optical system.

In the case of the lighting device proposed according to the invention, the reduction in the number of optical components leads to a comparatively higher efficiency. At the same time, the number of optical tools required for production is reduced. The reduced mechanical complexity also results in a reduced installation space. In addition, assembly and adjustment tolerances for other components can be minimized, since fewer components are provided in comparison to the lighting device known from the prior art.

The light guide unit is preferably formed from a solid, transparent material, with PMMA (polymethyl methacrylate) or PC (polycarbonate) being particularly suitable. The plastics mentioned are suitable because they are particularly easy to handle during the manufacturing process ses and the good physical, optical properties to form the light guide unit. The homogenization is based on Snell's law of refraction (Snell's law or Snell's law): through interactions at the interface of the light guide unit, the light beams introduced into it are reflected on the side walls, absorbed in the material of the light guide unit or transmitted to the coupling and decoupling surfaces. The light beams introduced into it are collected and homogenized by the geometry, in particular shape and/or length, of the light guide unit. A homogeneous distribution (in the solid angle) is achieved by superimposing a sufficient number of light rays with different colors and intensities.

The precise design of the light guide unit for homogenizing the light guided therein and for collimating it is within the scope of professional action. However, it is preferred if the first optical unit, which brings about a homogenization of the light guided therein, is rod-shaped. A sufficient length of the rod-shaped section of the first optical unit ensures that homogeneous light with constant luminance and constant color point is generated at the end of the first optical unit and enters the second optical unit.

The first optical unit expediently has a polygonal cross section with at least four corners in a plane perpendicular to the direction of light propagation. In particular, the cross section can be square or essentially square. Other cross-sectional shapes, such as a circle, hexagon or octagon, are also conceivable. A prerequisite for efficient introduction into the optical unit, with all cross-sectional geometries, is a sufficiently large area to introduce the entire amount of energy from the light unit into the optical system.

A further expedient configuration provides that the first optical unit has a tapering cross section in a plane of the direction of light propagation. Alternatively or additionally, it is expedient if the first optical unit has a constriction at its end lying in the direction of light propagation. A particularly good homogenization of the light guided in the first optical unit can be brought about by the tapering cross section, in particular in connection with the constriction.

According to a further expedient configuration, the exit surface of the second optical element is a refractive surface of the solid material. In particular, the refractive surface is aspherical. Alternatively or additionally, the refractive surface is circularly symmetrical.

The light is collimated by the shape of the exit surface of the second optical element. In this way it can be ensured that light is collimated when exiting the exit surface and directed exclusively onto the associated sub-array. In particular, this makes it possible to dispense with separate converging lenses for collimation in the multi-aperture projection unit, which contributes to increasing the optical efficiency and reducing the complexity of the illumination device.

A further expedient configuration provides that a plurality of light-guiding units, which are assigned to adjacent sub-arrays in a row, form an array of light-guiding units and are designed in one piece. As a result, production can be further simplified, since a number of light-guiding units are designed as one component. In addition, no separate alignment of the light-guiding units to one another or to the sub-arrays that are adjacent in the row and to which they are assigned is required. In particular, the array of light-guiding units can be produced in a simple and cost-effective manner using an injection molding process.

It is also expedient if the light-guiding unit or the array of light-guiding units are surrounded by an edge made of opaque material. The edge made of opaque material and the light-guiding unit or the array of light-guiding units are preferably formed in one piece as one component. In particular, the structural unit can be produced in a simple and inexpensive manner by a two-component injection molding process. Colored PMMA or PC can be used as the material for the edge.

It is also expedient if the edge made of opaque material is configured in such a way that it mechanically supports the partial array of one or more projection lenses assigned to the respective light guide unit in a predetermined position relative to the second end of the light guide unit. The term "mechanical support" is to be understood in particular as a non-positive and/or form-fitting mounting of sub-arrays. In this way, the lighting device can not only be provided with a reduced installation space, adjustment tolerances are also eliminated, as a result of which the optical efficiency is further increased.

A further expedient configuration provides that the edge made of opaque material is configured in such a way that it is positioned relative to a circuit board carrying the lighting units and is attached to it, as a result of which the lighting units are in a predetermined positional relationship to the light entry surfaces of the respective first optical units of the light guide unit or of the arrays of light lead units stand. In addition to simple production, adjustment tolerances can also be minimized in this way. As a result, a defined coupling of the light coupled into the light guide unit from the plurality of lighting units of the lighting device is provided in a simple manner. This also enables high optical efficiency.

The lighting device according to the invention can be provided for various purposes on a motor vehicle. In a preferred embodiment, the lighting device is an interior light for mounting in the interior of the motor vehicle. In one variant, the lighting device is installed in the roof liner of the motor vehicle and can generate corresponding light projections in the interior of the motor vehicle, e.g. on operating elements.

In a further embodiment, the lighting device according to the invention is an exterior light for attachment to the outside of the motor vehicle, i.e. the lighting device generates light projections outside the motor vehicle. The exterior light is preferably an area lighting device in order to generate a light projection on the ground in the area surrounding the motor vehicle in the predefined projection area. In this way, appealing light scenarios can be implemented in the area surrounding the motor vehicle.

In addition to the lighting device according to the invention, the invention relates to a motor vehicle that includes one or more of the lighting devices according to the invention or one or more preferred variants of the lighting device according to the invention.

• 1 eine geschnittene perspektivische Darstellung einer erfindungsgemäßen Beleuchtungsvorrichtung für ein Kraftfahrzeug;
• 2 eine Draufsicht auf die Beleuchtungsvorrichtung, wobei eine Multiapertur-Projektionseinheit nicht gezeigt ist;
• 3 eine geschnittene Querschnittsansicht eines Arrays aus Lichtleiteinheiten;
• 4 eine Ansicht auf das Array von Lichtleiteinheiten von unten; und
• 5 eine perspektivische Querschnittsdarstellung des Arrays von Lichtleiteinheiten.

An exemplary embodiment of the invention is described in detail below with reference to the accompanying figures. Show it:

• 1 a sectional perspective view of a lighting device according to the invention for a motor vehicle;
• 2 a plan view of the lighting device, wherein a multi-aperture projection unit is not shown;
• 3 a cut cross-sectional view of an array of light guide units;
• 4 a view of the array of light guide units from below; and
• 5 a perspective cross-sectional view of the array of light guide units.

An exemplary embodiment of the invention is described below using a lighting device for a motor vehicle that is intended to generate a light projection that falls on a projection surface, either in the interior of the motor vehicle or in the area surrounding the motor vehicle outside of it.

The spatial position of the lighting device described below is illustrated by an x, y and z coordinate system. A light propagation direction P lies parallel to the z-axis of the coordinate system.

The lighting device comprises a multi-aperture projection unit 1 in the form of a microlens array (MLA), which is shown in the cut perspective view 1 is evident. A large number of projection lenses 7 can be seen, only some of which are denoted by this reference symbol for reasons of clarity. The microlens array is constructed in the form of a matrix and generally contains n×m projection lenses, where n=m or n≠m can be the case. By way of example, the array is divided into four sub-arrays TA each of o×p projection lenses 7, where the following applies: o<n and p<m. The four sub-arrays TA are arranged in a row in the x-direction. A separate RGB LED lighting unit 3 (RGB LED unit 3 for short) of a lighting device 2 is assigned to each of the four subarrays TA, with each RGB LED unit 3 being provided exclusively for illuminating an individual subarray TA.

Each of the sub-arrays TA of the multi-aperture projection unit 1 comprises a glass substrate 6, on the upper side of which the projection lenses 7 already mentioned are arranged. The underside of the glass substrate 6 is either flat or provided with (converging) lenses, each projection lens 7 then being assigned a (converging) lens. Each of the projection lenses 7 is assigned an object structure or slide in the glass substrate 6 that is not shown in detail. When illuminated by means of the lighting device 2 described below, the object structures are projected via the opposite projection lens 7 into a projection surface area PF, which is indicated schematically by the arrow P, the direction of which corresponds to the direction of light propagation. This results in a light projection in the projection area PF, which is indicated schematically by an ellipse.

The multi-aperture projection unit 1 or its sub-arrays TA are designed in such a way that the object structures preferably generate individual images of the same size, with each individual image covering the projection area PF. The individual images generated by the object structures are thus superimposed to form an overall image in the projection area PF.

To illuminate the sub-arrays TA of the multi-aperture projection unit 1 is a Leuchteinrich Device 2 is provided, which includes the already mentioned plurality of RGB LED units 3, which are arranged on a circuit board 4 of the lighting device 2. In a manner known per se, each of the RGB LED units 3 contains a red LED 3a, a green LED 3b and a blue LED 3c, which are not shown in detail in the figures. The RGB LED units 3 are controlled together via a control device (not shown), the control device being able to address the RGB LED units 3 individually and the brightness of the LEDs contained therein being able to be varied separately.

A respective RGB unit 3 can generate white light and/or colored light. A respective RGB unit 3 can preferably be controlled in such a way that the color temperature of the white light present at the exit from the respective light guide element 5 and/or the color of the colored light present at the exit from its exit surface can be varied. RGB units that enable the color temperature or the color of the light to be set are known per se. These lighting units usually have lighting elements that emit light in different colors. The lighting elements in the above RGB unit 3 can be configured in various ways. These are preferably LEDs and/or laser diodes, as a result of which a compact design of the RGB unit 3 is achieved. In particular, an RGB lighting unit can be an RGB-LED lighting unit made up entirely of LEDs. Likewise, the RGB lighting unit can be an RGB lighting unit that consists exclusively of laser diodes.

As already mentioned, each RGB LED unit 3 is used to separately illuminate a corresponding sub-array TA. To achieve this, a light guide unit 5 is used, which is positioned in front of each RGB LED unit 3 in the light propagation direction and extends from a first end 5a adjacent to the corresponding RGB LED unit 3 to a second end 5b adjacent to the side of the sub-array TA of the micro-lens array 1 which is opposite to the projection lenses 7 side. In the embodiment described here, the light guide unit 5 is formed from a transparent solid material, in particular PMMA or PC. The light guide unit 5 directs light emitted by the respective RGB LED unit 3 to the corresponding, assigned subarray TA.

Each light guide unit 5 comprises a first optical unit 5-1 at the first end 5a and a second optical unit 5-2 at the second end 5b. The first and the second optical unit 5-1 and 5-2 are designed as a one-piece component and are produced in particular by an injection molding process.

The first optical unit 5-1 is, as readily from the representations of 1 , 3 and 5 shows, rod-shaped and is therefore also referred to as a rod-shaped optical unit. A first end 5-1a of the first optical unit 5-1 represents an end on the lighting unit side or the first end 5a of the light guide unit 5. A second end 5-1b of the first optical unit 5-1 goes into a first end 5 -2a of the second optical unit 5-2. The second end 5b of the light guide unit 5 constitutes a second end 5-2b of the second optical unit 5-2 and is referred to as a projection unit side end. As readily from the cross-sectional views of 1 , 3 and 5 shows, the second optical unit 5-2 has an approximately mushroom-shaped cross section.

The exact optical configuration of the light guide unit 5 and its first and second optical units 5-1 and 5-2 is within the scope of professional action and is also due in particular to the available installation space.

The first optical unit 5-1 is configured to cause the light guided therein to be homogenized, so that the light generated in the light propagation direction P at the second end 5-1b of the first optical unit 5-1 and entering the second optical unit 5-2 Light has a luminance and a color locus that are essentially constant over the cross-sectional area at the second end 5-1b of the first optical unit 5-1. The first optical unit 5-1 ensures that the light fed from the RGB unit 3 into the first optical unit 5-1 has a uniform color or color mixture. This is ensured in particular by the (cross-sectional) shape of the first optical unit 5-1 and a sufficient length.

To this end, it is advantageous if the first optical unit has a polygonal cross section with at least four corners in a plane perpendicular to the light propagation direction P (ie in the xy plane of the coordinate system shown in the figures). How best 4 shows, the cross section of the first end of the first optical unit 5-1 is essentially square, for example, in order to enable good coupling of the light from the RGB light unit. However, it is also possible to provide a different cross section, in particular a hexagonal or octagonal cross section.

Expediently, the first optical unit 5-1 has a tapering cross section in a plane of the light propagation direction P (ie in the yz plane of the coordinate system). It is particularly useful if the first optical unit has a constriction 18 at its second end 5-1b, as is particularly evident from FIGS 1 and 5 evident.

The light guided in the second optical unit 5-2, which has a constant luminance and a constant color locus (ie a fixed color or fixed color mixture), is emitted when exiting an exit surface 11 (see 1 , 3 and 5 ) is collimated and thus directed exclusively to the assigned subarray TA. For this purpose, the exit surface 11 of the second optical element 5-2 formed from solid material has a refractive surface which is preferably aspherical and/or circularly symmetrical.

The light guide units 5 are, as in all 1 until 5 can be seen, formed in a 1 x 4 array and implemented in particular as a one-piece array of light guide units 5. In this case, the array of light guide units is surrounded by a peripheral edge 12, which consists of an opaque material, preferably also PMMA or PC. The edge 12 has in plan view ( 2 and 4 ) has a rectangular shape as an example. The array of light guide units 5 and the edge 12 made of opaque material preferably form a one-piece component and are produced in particular by a two-component injection molding process.

A bottom surface 15 with recesses 16 running in the xy plane is provided inside the edge 12 . The bottom surface 15 is an integral part of the edge 12, ie formed in one piece with this and is preferably made of the same material. A foot 17 of the respective second optical unit 5-2, constituting the first end 5-2a of the second optical unit 5-2, rests on the bottom surface 15 of the rim 12, the second end 5-1b of the first optical unit 5-1 is guided through an associated recess 16 in the bottom surface 15 (see 3 ).

The edge 12 made of opaque material is also configured such that it mechanically supports the partial array TA assigned to the respective light guide unit 5 in a predetermined position relative to the second end 5 - 2b of the light guide unit 5 . More precisely, the respective glass substrate 6 is held in a defined manner by the edge 12 and possibly other webs or projections as holding elements 14 by force and/or positive locking, so that in particular there is a fixed positional relationship to the exit surface of the second optical unit 5-2. As a result, the sub-arrays TA each come to rest in a defined position in relation to alignment and distance from the assigned light-guiding units 5 .

The edge 12 of opaque material is further configured to be positioned relative to and fixed to the circuit board carrying the RGB units 3 . For this purpose, the edge has a plurality of projections 13 (see 1 , 3 , 4 and 5 ) through associated recesses 4L (see 1 ) of circuit board 4 are inserted. The projections 13 are dimensioned in such a way that the RGB units 3 directly adjoin the entry surface of the first ends 5-1a of the first optical unit 5-1 of the light units 5 or have a defined spacing. As a result, the RGB units 3 are in a predetermined positional relationship to the light entry surfaces 10 of the respective first optical units 5-1 of the light guide units 5 with regard to alignment and distance.

The configuration of the lighting device results in several advantages. On the one hand, the lighting device becomes smaller. There are no adjustment tolerances due to the reduction in the number of components and due to the specific positioning of the components relative to one another. The optical efficiency is increased by reducing the optical surfaces. Due to the reduced number of individual components, there are cost advantages in production. In addition, this design enables a compact, efficient and cost-effective combination of RGB lighting units with micro-aperture projection units.

reference list

1

multi-aperture projection unit

2

lighting device

3

RGB lighting unit

3a

red LED

3b

green LED

3c

blue LED

4

circuit board

4L

Recess for projection 13

5

light guide unit

5-1

first optical unit of the light guide unit 5 (bar-shaped optical unit)

5-2

second optical unit of the light guide unit 5 (mushroom-shaped optical unit)

5a

first end of the light guide unit

5b

second end of the light guide unit

5-1a

first end of the first optical unit 5-1 (luminous unit side end)

5-1b

second end of the first optical unit 5-1

5-2a

first end of the second optical unit 5-2

5-2b

second end of the second optical unit 5-2 (projection unit side end)

6

glass substrate

7

projection lenses

10

Entrance surface of the first optical unit 5-1

11

Exit surface of the second optical unit 5-2

12

edge

13

head Start

14

holding element

15

floor space

16

Recess in the bottom surface 15

17

Foot of the second optical unit 5-2

18

Constriction of the first optical unit 5-1

TA

subarrays

P

Light propagation direction arrow

PF

projection screen area

Claims (16)

Lighting device for a motor vehicle, comprising a multi-aperture projection unit (1) and a lighting device (2) with a plurality of lighting units (3), which can be controlled individually to vary their brightness and are provided for lighting the multi-aperture projection unit (1), set up for this purpose is to generate a light projection in a predetermined projection surface area (PF) from the light of the lighting device (2), the multi-aperture projection unit (1) comprising an array of projection lenses (7) and each projection lens (7) being assigned an object structure which is projected through the respective projection lens (7) into the specified projection surface area (PF), the array of projection lenses (7) comprising a plurality of disjoint sub-arrays (TA) each consisting of one or more projection lenses (7), the assigned object structures for projection lenses (7 ) are different between different subarrays (TA) and fu r projection lenses (7) in the same sub-array (TA) correspond to each other, each sub-array (TA) being separately assigned a lighting unit (3) of the lighting device (2) and a light-guiding unit (5), the light-guiding unit (5) receiving light from the lighting unit (3) from a first end (5a) of the light-guiding unit (5) to a second end (5b) of the light guide unit (5), and wherein the light guide unit (5) comprises a first optical unit (5-1) at its first end (5a) and a second optical unit (5-2) at its second end (5b), which are formed as a one-piece component, wherein the light guide unit (5) is configured to in the first optical unit (5-1) to bring about a homogenization of the light guided therein, so that the light generated in the light propagation direction (P) at one end of the first optical unit (5-1) and fed into the second optical unit (5-2 ) entering light has a luminance and a color point which are substantially constant at the end of the first optical unit (5-1), and to collimate the light guided in the second optical unit (5-2) when exiting an exit surface (11) at the second end (5b) of the light guide unit (5) and to direct it exclusively onto the respective sub-array (TA). lighting device claim 1 , characterized in that each projected object structure covers substantially the entire predetermined projection surface area (PF). lighting device claim 1 or 2 , characterized in that the light-guiding unit (5) is formed from light-transmitting solid material. Lighting device according to one of the preceding claims, characterized in that the first optical unit (5-1) is rod-shaped. Lighting device according to one of the preceding claims, characterized in that the first optical unit (5-1) has a polygonal cross-section with at least four corners in a plane perpendicular to the direction of light propagation. Lighting device according to one of the preceding claims, characterized in that the first optical unit (5-1) has a tapering cross section in a plane of the light propagation direction. Lighting device according to one of the preceding claims, characterized in that the first optical unit (5-1) has a constriction (18) at its end lying in the direction of light propagation. Lighting device according to one of the preceding claims, characterized in that the exit surface (11) of the second optical element (5-2) is a refractive surface of the solid material. lighting device claim 8 , characterized in that the refractive surface is aspherical. lighting device claim 8 or 9 , characterized in that the refractive surface is circularly symmetrical. Lighting device according to one of the preceding claims, characterized in that a plurality of light-guiding units (5), which are assigned to adjacent sub-arrays (TA) in a row, form an array of light-guiding units (5) and are designed in one piece. Lighting device according to one of the preceding claims, characterized in that the light guide unit (5) or the array of light guide units (5) are surrounded by a rim (12) made of opaque material. lighting device claim 12 , characterized in that the edge (12) made of opaque material and the light guide unit (5) or the array of light guide units (5) are integrally formed as a component. lighting device claim 12 or 13 , characterized in that the edge (12) made of opaque material is configured in such a way that this sub-array (TA) of one or more projection lenses (7) assigned to the respective light guide unit (5) is in a predetermined position relative to the second end (5b) the light guide unit (5) carries mechanically. Lighting device according to one of Claims 12 until 14 , characterized in that the rim (12) of opaque material is configured to be positioned relative to and fixed to a circuit board (4) carrying the lighting units (3), thereby placing the lighting units (3) in a predetermined positional relationship Light entry surfaces (10) of respective first optical units (5-1) of the light guide unit (5) or of the array of light guide units (5) are available. Motor vehicle comprising one or more lighting devices according to one of the preceding claims.

Images