Lighting device for motor vehicle

Abstract

The invention relates to a lighting device for a motor vehicle, comprising at least one light source, a planar light guide (11), at least one optical component and a cover lens (15), characterized in that the lighting device is arranged to be mounted in the motor vehicle such that a normal (16) on the cover lens (15) forms an angle (alpha) with the longitudinal direction (17) of the vehicle that is not equal to 0 DEG, the light guide (11) is arranged in the lighting device in such a way that the at least one exit surface (13, 14) of the light guide (11) forms an angle (beta) with the cover lens (15) at least in some regions, said angle being not equal to 0 DEG. The angle (gamma) formed by the normal (19) on at least some sections of the at least one exit surface (13, 14) of the light guide (11) with the vehicle longitudinal direction (17) is smaller than the angle formed by the normal (16) on the cover lens (15) with the vehicle longitudinal direction.

Description

Technical Field

[0001] The invention relates to a lighting device for a motor vehicle according to the preamble of claim 1 . Background Art

[0002] For signal functions in motor vehicles, such as tail lights, brake lights, turn indicators or daytime running lights, the design has long been a decisive factor in tail lights or headlights. Since the introduction of LED technology, the design of these lighting devices has become even more important, because the small light-emitting diodes, which are usually used in larger numbers, can be used more flexibly than large bulbs as light sources for signal functions, thus offering a wide range of design possibilities in combination with the selected optical system.

[0003] A variant of LED technology is the form of OLED technology, in which the light-emitting device is not a small point like a light-emitting diode, but is instead designed to be planar and larger to form the desired luminous surface, which can be illuminated very uniformly. As a disadvantage in OLED technology, it has been proven that the cost of OLED technology is significantly higher than that of LED technology. The reasons for these high costs are complex manufacturing processes, different shapes predetermined by the design, and a small number of pieces. In addition, there are special high requirements in the automotive field, such as durability under UV load and forces such as vibration, impact and shaking, and temperature resistance in the range of -40°C to +85°C or +100°C. For organic light-emitting diodes, these requirements are significantly more difficult to meet than standard light-emitting diodes.

[0004] This has led to a search for alternatives to achieve concepts similar to those using organic light-emitting diodes (OLEDs), in particular to achieve a homogeneously illuminated surface. This is achieved by using light-emitting diodes (LEDs) with a planar light guide and upstream optical elements in the form of microstructured films or thin optical lenses for scattering the light emerging from the light guide. Overall, this provides a flat light module that offers high performance with homogeneous illumination of the entire surface.

[0005] When integrated into taillights, a plurality of planar light modules can be positioned offset next to one another and one behind the other, just as organic light-emitting diodes, in order to produce a desired individual appearance of a signal function, such as a taillight or a rear brake light.

[0006] A lighting device of the type mentioned at the beginning is known from DE 10 2021 122 264 A1. The lighting device described therein comprises a lighting module configured as a planar light module, which has at least one light source, an optical waveguide, a scattering lens, and a luminous surface configured as a cover lens, from which light is emitted when the lighting device is in operation. The planar light module also comprises a housing having a reflective surface.

[0007] According to an exemplary lighting device of the prior art, which is constructed as a planar light module, Figure 6 and Figure 7 As can be seen in the figure. The planar light module includes a light source 1, which has a plurality of light emitting diodes (LEDs). The planar light module also includes a housing 2, which has a front housing part 2a and a rear housing part 2b, which are connected to each other by a locking device. A plate-shaped light conductor 3 with micro-optical elements, a white diffuse reflective film 4 behind the light conductor 3, and two or three micro-optical films 5 in front of the light conductor 3 are introduced between the housing parts 2a and 2b, which are responsible for the light distribution and efficiency of the system by coordinating the various micro-optical components with each other. The principle of this basic structure is to provide a light-emitting element with a consistent, uniformly illuminated surface. For this purpose, the lighting device includes a cover lens 6 that serves as the illuminated exit surface of the lighting device.

[0008] The best performance of such planar light modules is achieved when the planar light modules are networked in parallel without any rotation or tilt. Due to the light distribution of the system, a slight horizontal rotation angle of up to 10° is acceptable. However, if the design of the headlamp or luminaire specifies the placement of such planar light modules at a greater horizontal rotation angle, this will result in reduced efficiency, because the light distribution of the planar light module will be rotated according to the predetermined angle and there will only be a reduced light intensity in the forward direction, where the maximum intensity for the signal function is required by law.

[0009] This situation is Figure 8 and Fig. 9 This is explained in . Figure 8 A state is shown in which the lighting device is installed in a vehicle so that the normal 7 on the cover lens 6 is parallel to the vehicle longitudinal direction 8. From the schematically drawn light distribution 9 it can be seen that the light intensity is greatest in the forward direction.

[0010] exist Fig. 9 In the example of FIG. 1 , the planar light module is installed in the vehicle so that the normal 7 on the cover lens 6 forms an angle α not equal to 0°, for example an angle α of about 40° with the vehicle longitudinal direction 8. As can be seen from the schematically drawn light distribution 9, the light intensity in the forward direction is significantly reduced in this installed state.

[0011] This results in significantly more power and luminous flux having to be fed into the system to compensate for the reduced performance due to the rotated mounting position. This is often not possible or justifiable due to the maximum predetermined total power or in terms of sustainability and energy efficiency. Summary of the invention

[0012] The problem underlying the present invention is therefore to provide a lighting device of the type mentioned at the outset, in which a sufficient light intensity in the forward direction is achieved even with an inclined mounting position of the cover lens, without significantly increasing the power input into the lighting device.

[0013] This is achieved according to the invention by a lighting device of the type mentioned at the outset having the features of the characterizing clause of claim 1. The dependent claims relate to preferred embodiments of the invention.

[0014] According to claim 1, the lighting device is arranged to be installed in a vehicle so that the normal on the cover lens forms an angle different from 0° with the longitudinal direction of the vehicle, and the light conductor is arranged in the lighting device so that at least one exit surface of the light conductor forms an angle different from 0° with the cover lens at least in some areas, so that when installed in the vehicle, the normal on at least some sections of at least one exit surface of the light conductor forms an angle with the longitudinal direction of the vehicle that is smaller than the angle formed by the normal on the cover lens with the longitudinal direction of the vehicle. The design-desired rotational mounting position of the cover lens is maintained during the design. At the same time, the light conductor and, if necessary, further components of the lighting device are more advantageously oriented for forward-directed light radiation.

[0015] It can be provided that the lighting device is designed to be installed in a vehicle such that the normal to the cover lens forms an angle of between 10° and 50°, for example between 20° and 40°, with the longitudinal direction of the vehicle. The normal to the optical waveguide and, if appropriate, to other components of the lighting device can form a significantly smaller angle, for example 0° to 20°, with the longitudinal direction of the vehicle for more effective forward-directed light emission.

[0016] It is possible that the cover lens is flat or curved and / or that at least one exit surface of the light guide is flat or curved. Even in the case of a curved cover lens and / or a curved light guide, the angle formed by a normal or normals on the light guide and, if applicable, normals on other components of the lighting device with the longitudinal direction of the vehicle can be smaller than the angle formed by a normal or normals on the cover lens with the longitudinal direction of the vehicle. In this case, the radius of curvature of at least one exit surface of the light guide can differ at least in places from the radius of curvature of the cover lens.

[0017] It can be provided that the optical waveguide has a longitudinal direction and a transverse direction perpendicular to the longitudinal direction and a depth perpendicular to the longitudinal direction and the transverse direction, wherein the optical waveguide has two end faces in the longitudinal direction, two narrow faces extending at least partially in the longitudinal direction and two wide faces extending in the longitudinal direction. Here, the incident face of the optical waveguide can be constructed on one of the narrow faces extending in the longitudinal direction of the optical waveguide, and at least one exit face of the optical waveguide can be constructed on one of the wide faces extending in the longitudinal direction of the optical waveguide, in particular, one exit face is constructed on each of the two wide faces extending in the longitudinal direction of the optical waveguide. It can be provided that the extension of the optical waveguide in the longitudinal direction is greater than the extension in the transverse direction, and the extension of the optical waveguide in the transverse direction is greater than the extension in the depth direction. Alternatively, the extension of the optical waveguide in the longitudinal direction can be as large as or smaller than the extension in the transverse direction.

[0018] It is possible that at least one exit surface of the optical waveguide is curved in the longitudinal direction of the optical waveguide. In this case, the radius of curvature of at least one exit surface of the optical waveguide can vary in the longitudinal direction of the optical waveguide. Even in this embodiment, it can be achieved that the normal to the optical waveguide and, if applicable, to other components of the lighting device form a smaller angle with the longitudinal direction of the vehicle than the normal or normals to the cover lens form with the longitudinal direction of the vehicle.

[0019] It can be provided that the optical waveguide has at least one step, preferably a plurality of steps, wherein the steps are spaced apart from one another, in particular in the longitudinal direction of the optical waveguide. Here, sections of at least one exit surface adjoining at least one step, in particular each step, can be tilted relative to one another, so that in the state installed in the motor vehicle, a normal to at least one first section of at least one exit surface of the optical waveguide forms a smaller angle with the longitudinal direction of the vehicle than a normal to at least one second section of at least one exit surface forms with the longitudinal direction of the vehicle. Thus, at least one section, preferably a plurality of sections of the optical waveguide are oriented to ensure effective light radiation in the forward direction.

[0020] It is possible that at least one optical component is configured as a microstructured film and / or a microstructured optical lens, wherein at least one microstructured film or at least one microstructured optical lens is arranged, for example, between the light conductor and the cover lens. It is also possible that at least one optical component is configured as an at least partially reflective reflective surface, which is arranged on the side of the light conductor facing away from the cover lens, wherein the lighting device is configured so that light emitted from the exit surface of the light conductor facing away from the cover lens is irradiated on the reflective surface, reflected from the reflective surface back to the exit surface and at least partially re-injected into the light conductor, and then the light is emitted from the exit surface facing the cover lens and passes through at least one cover lens. In this way, the lighting device can provide high performance with uniform illumination of the cover lens by reflecting the light emitted from the light conductor from the rear side like a planar light module and by targeted scattering on the microstructured film and / or the optical lens.

[0021] It can be provided that at least one microstructured film and / or at least one microstructured optical lens and / or a reflective surface is at least partially parallel to at least one exit surface of the light guide. Thus, the at least one microstructured optical lens and / or the reflective surface is oriented in the longitudinal direction of the vehicle like the light guide, thereby ensuring effective light radiation in the forward direction.

[0022] It is possible for the lighting device to have a plurality of light sources which are designed as light-emitting diodes and which are arranged, in particular, on a common printed circuit board, preferably wherein the light-emitting diodes are arranged adjacent to one another in the longitudinal direction of the optical waveguide. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be explained in more detail below with reference to the accompanying drawings. In the accompanying drawings:

[0024] Figure 1 A perspective view showing a light guide body and a cover lens according to a first embodiment of the lighting device of the present invention;

[0025] Figure 2 A perspective view showing a light guide body and a cover lens according to a second embodiment of the lighting device of the present invention;

[0026] Figure 3 A perspective view showing a light guide body and a cover lens according to a third embodiment of the lighting device of the present invention;

[0027] Figure 4 A perspective view showing a light guide body and a cover lens according to a fourth embodiment of the lighting device of the present invention;

[0028] Figure 5 A schematic top view of the lighting device according to the present invention when installed in a motor vehicle is shown, wherein a normal line on the cover lens forms an angle not equal to 0° with the longitudinal direction of the vehicle;

[0029] Figure 6 A perspective view showing a lighting device according to the prior art;

[0030] Figure 7 Show according to Figure 6 An exploded view of the lighting device;

[0031] Figure 8 A schematic top view of a lighting device according to the prior art when installed in a motor vehicle is shown, wherein a normal line on the cover lens is parallel to the longitudinal direction of the vehicle;

[0032] Fig. 9 A schematic top view of a lighting device according to the prior art in a state of being installed in a motor vehicle is shown, wherein a normal line on the cover lens forms an angle not equal to 0° with the longitudinal direction of the vehicle. DETAILED DESCRIPTION

[0033] In the figures, identical or functionally identical parts are provided with the same reference symbols.

[0034] The lighting device shown in the drawings includes a plurality of light sources, which are configured as light emitting diodes (LEDs). Figure 1 A circuit board 10 is shown, on which light sources in the form of light-emitting diodes are arranged. A plurality of light-emitting diodes can also have different colors in this case, in order to realize a double or triple function, for example. These functions can be, for example, position lights, daytime running lights and turn indicators, or position lights, daytime running lights and an automated driving function, wherein the automated driving function requires the color cyan.

[0035] The lighting device further comprises a planar light conductor 11, which has a longitudinal direction L and a transverse direction Q perpendicular thereto and a depth T perpendicular to the longitudinal direction L and the transverse direction Q (see Figure 1 ). Here, the extension of the optical waveguide 11 in the longitudinal direction L is greater than the extension in the transverse direction Q, and the extension in the transverse direction Q is greater than the extension in the depth T direction. As a result, two end faces of the optical waveguide 11 in the longitudinal direction L, two narrow faces extending at least partially in the longitudinal direction L, and two wide faces extending in the longitudinal direction L are produced.

[0036] The optical waveguide 11 has an incident surface 12 and a first emitting surface 13 and a second emitting surface 14 (see Figure 1 ). Here, one of the narrow surfaces of the optical waveguide 11 extending in the longitudinal direction L of the optical waveguide 11 serves as the incident surface 12. In addition, two wide surfaces of the optical waveguide 11 extending in the longitudinal direction L serve as the exit surfaces 13, 14 arranged on the front and rear sides of the optical waveguide 1.

[0037] The lighting device further comprises a first optical component configured as a microstructured film and / or a microstructured optical lens arranged in front of the first exit surface 13 of the light conductor 11, and a second optical component configured as a microstructured film and / or a microstructured optical lens arranged in front of the first optical component. These optical components may, for example, substantially correspond to Figure 7 The micro-optical film 5 shown in FIG. Here, at least the second optical component is optional and can also be omitted. At least one optical component can have a structured portion (not shown) that can contribute to the diffusion and uniformity of the light emitted from the lighting device.

[0038] The lighting device also includes Figures 1 to 4 A housing (not shown) is provided in which the light source 10, the light conductor 11 and optical components such as at least one microstructured film and / or at least one microstructured optical lens can be at least partially accommodated. In order to simplify the installation of the optical components, the housing can be embodied in two parts and here has a rear housing part and a front housing part. The light conductor 11 and the optical components can thus be positioned between these housing parts and held and fixed when the two housing parts are assembled together. The housing parts can be locked to each other, screwed or welded from the rear side. In particular, the housing parts can essentially correspond to Figure 7 The housing parts 2a, 2b are shown in FIG.

[0039] The rear housing part may have a rear wall that is at least partially reflective. Alternatively, a reflective optical component may be provided, which is, for example, a reflective optical film having a white surface, in order to diffusely reflect the light back. The reflective optical component may be bent at the edge so that the second exit surface 14 of the optical conductor 11 and the side edge of the optical conductor 11 are covered, thereby ideally reflecting the emitted light back into the optical conductor 11. In particular, the reflective optical component may substantially correspond to Figure 7 The diffusely reflective film 4 is shown in FIG.

[0040] The lighting device further comprises a cover lens 15 which is illuminated as evenly as possible by the light emitted from the optical conductor 11 (see Figures 1 to 4 ). The cover lens 15 can serve as an illuminated exit surface of the lighting device. It is possible that the cover lens 15 is constructed as a two-component part integral with the front housing part.

[0041] When the lighting device is in operation, the light emitted from the light source is coupled into the incident surface 12 of the optical waveguide 11. A portion of the coupled light is directly emitted from the first emission surface 13 at Figure 1The light is emitted downward from the optical conductor 11 and leaves the lighting device after passing through the optical component and the cover lens 15. In addition, a portion of the light propagating in the optical conductor 11 is emitted from the second emission surface 14 of the optical conductor 11 and irradiates the reflective optical component. The light is reflected from the optical component back to the second emission surface 14, so that the light is at least partially re-incident into the optical conductor 11 through the second emission surface 14, and then the light is emitted from the first emission surface 13 and leaves the lighting device through the optical component and the cover lens 15.

[0042] The lighting device is designed to be installed in a motor vehicle so that the normal 16 on the cover lens 15 forms an angle α with the longitudinal direction 17 of the vehicle, which in the illustrated embodiment is in particular approximately between 30° and 40° (see for example Figure 5 Therefore, the cover lens 15 is relatively Figures 1 to 5 The vehicle transverse direction 18 is shown to be inclined to a greater extent.

[0043] At the same time, the optical waveguide 11 is at least partially spaced apart from the cover lens 15 and tilted relative to the cover lens 15. Therefore, the optical waveguide 11 forms an angle β not equal to 0° with the cover lens 15, for example, an angle β between 10° and 20° (see Figure 5 ). This results in that, when installed in the motor vehicle, the angle γ formed by the normal 19 on at least some sections of the exit surfaces 13 , 14 of the optical waveguide 11 with the longitudinal direction 17 of the vehicle is smaller than the angle α between the normal 16 on the cover lens 15 and the longitudinal direction 17 of the vehicle (see Figure 5 ). In this case, at least one microstructured film and / or at least one microstructured optical lens and the reflective surface are parallel to the exit surfaces 13 , 14 of the light guide 11 .

[0044] from Figure 5 As can be seen from the light distribution 20 shown in FIG. 1 , the light intensity in the forward direction is relatively large. In particular, since the light conductor 11 is tilted to a lesser extent relative to the cover lens 15, the light intensity in the forward direction is significantly greater than that in the conventional light distribution 20. Fig. 9 An embodiment is schematically shown in FIG.

[0045] Another advantage of at least partially spacing the optical waveguide 11 from the cover lens 15 is the additional available space between the optical waveguide 11 and the cover lens 15. This space can be used in particular to enlarge the circuit board 10, which leads to more favorable thermal conditions and less thermal load on the light-emitting diodes. This measure also helps to improve the performance of the lighting device.

[0046] Figure 2An embodiment is shown in which the light guide 11 is curved in its longitudinal direction L, resulting in a curved geometrical extension of the light guide 11. In this embodiment, the microstructured film and / or at least one microstructured optical element as well as the reflective surface are also designed parallel to the light guide 11 or at least partially abut against it.

[0047] Figure 3 An embodiment is shown in which the optical waveguide 11 has steps 21 arranged next to one another in its longitudinal direction L. This results in a first, relatively long section 22 of the optical waveguide 11 adjoining the step 21, which is relatively slightly inclined with respect to the vehicle transverse direction 18. Furthermore, a second, relatively short section 23 of the optical waveguide 11 adjoining the step 21 is produced, which is relatively more inclined with respect to the vehicle transverse direction 18. In this embodiment, the light intensity in the forward direction is also relatively high, since the first section 22 of the optical waveguide 11, which extends almost parallel to the vehicle transverse direction 18, contributes disproportionately to the light distribution.

[0048] In this embodiment, the microstructured film and / or at least one microstructured optical element and the reflective surface are adapted to the shape of the light guide 11 so that they each extend in places parallel to the light guide 11 or at least partially abut against the light guide 11 .

[0049] according to Figure 4 Implementation and basis of Figure 3 The embodiment of FIG. 1 differs only in that a greater number of steps are provided, which are spaced shorter apart from one another in the longitudinal direction L of the optical waveguide 11 .

[0050] Reference numerals list

[0051] 1 Light Source

[0052] 2 Shell

[0053] 2a, 2b Shell part

[0054] 3. Photoconductor

[0055] 4Reflective film

[0056] 5Micro-optical film

[0057] 6 Cover lenses

[0058] 7 Cover the normals on the lens

[0059] 8 Longitudinal direction of vehicle

[0060] 9Light distribution

[0061] 10 Circuit Board

[0062] 11 Photoconductor

[0063] 12 Incident surface of light conductor

[0064] 13 First emission surface of the light conductor

[0065] 14 Second emission surface of the light conductor

[0066] 15 Covering lenses

[0067] 16 Overlay normals on the lens

[0068] 17 Vehicle longitudinal direction

[0069] 18 Vehicle lateral direction

[0070] 19 Normal to the light-emitting surface of the optical conductor

[0071] 20 Light distribution

[0072] 21 steps

[0073] 22 First section of the light guide adjacent to the step

[0074] 23 Second section of the light guide adjacent to the step

[0075] L Longitudinal direction of the optical fiber

[0076] QLateral direction of the light conductor

[0077] Depth of light guide

[0078] α is the angle between the normal to the cover lens and the longitudinal direction of the vehicle

[0079] β is the angle between the light guide and the cover lens

[0080] γ is the angle between the normal to the exit surface of the optical waveguide and the longitudinal direction of the vehicle

Claims

1. A lighting device for a motor vehicle, comprising: - at least one light source; - a planar light guide (11) having an incident surface (12) and at least one exit surface (13, 14); - at least one optical component; - Cover lens (15); - wherein the lighting device is arranged so that the light generated by the at least one light source is at least partially incident on the light conductor (11) through the incident surface (12), the light entering through the incident surface (12) is at least partially emitted from the at least one exit surface (13, 14), the light emitted from the at least one exit surface (13, 14) of the light conductor (11) at least partially passes through the at least one optical component and / or is reflected by the at least one optical component, and the light emitted from the at least one exit surface (13, 14) of the light conductor (11) is at least partially emitted from the lighting device through the cover lens (15), The invention is characterized in that the lighting device is arranged to be installed in a motor vehicle so that a normal (16) on a cover lens (15) forms an angle (α) not equal to 0° with a longitudinal direction (17) of the vehicle, and the optical waveguide (11) is arranged in the lighting device so that at least one exit surface (13, 14) of the optical waveguide (11) forms an angle (β) not equal to 0° with the cover lens (15) at least in certain areas, so that when installed in the motor vehicle, an angle (γ) formed by a normal (19) on at least some sections of the at least one exit surface (13, 14) of the optical waveguide (11) with the longitudinal direction (17) of the vehicle is smaller than an angle formed by a normal (16) on the cover lens (15) with the longitudinal direction of the vehicle.

2. The lighting device according to claim 1, characterized in that: The lighting device is designed to be installed in a motor vehicle so that a normal (16) on the cover lens (15) forms an angle (α) between 10° and 50°, for example between 20° and 40°, with the longitudinal direction (17) of the vehicle.

3. The lighting device according to any one of claims 1 or 2, characterized in that: The cover lens (15) is flat or curved, and / or the at least one exit surface (13, 14) of the light conductor (11) is flat or curved.

4. The lighting device according to claim 3, characterized in that: The radius of curvature of the at least one exit surface (13, 14) of the optical waveguide (11) differs at least in places from the radius of curvature of the cover lens (15).

5. The lighting device according to any one of claims 1 to 4, characterized in that: The optical waveguide (11) has a longitudinal direction (L) and a transverse direction (Q) perpendicular to the longitudinal direction and a depth (T) perpendicular to the longitudinal direction (L) and the transverse direction (Q), wherein the optical waveguide (11) has two end faces in the longitudinal direction (L), two narrow faces extending at least partially in the longitudinal direction (L) and two wide faces extending in the longitudinal direction (L).

6. The lighting device according to claim 5, characterized in that: The incident surface (12) of the optical waveguide (11) is constructed on one of the narrow surfaces of the optical waveguide (11) extending in the longitudinal direction (L), and the at least one exit surface (13, 14) of the optical waveguide (11) is constructed on one of the wide surfaces of the optical waveguide (11) extending in the longitudinal direction (L), in particular, one exit surface (13, 14) is constructed on each of the two wide surfaces of the optical waveguide (11) extending in the longitudinal direction (L).

7. The lighting device according to any one of claims 5 or 6, characterized in that: The at least one exit surface (13, 14) of the optical waveguide (11) is curved in the longitudinal direction (L) of the optical waveguide (11).

8. The lighting device according to claim 7, characterized in that: The radius of curvature of the at least one exit surface (13, 14) of the optical waveguide (11) changes in the longitudinal direction (L) of the optical waveguide (11).

9. The lighting device according to any one of claims 1 to 8, characterized in that: The optical waveguide (11) has at least one step (21), preferably a plurality of steps (21).

10. The lighting device according to claim 9, characterized in that: The steps (21) are spaced apart from one another in the longitudinal direction (L) of the optical waveguide (11).

11. The lighting device according to any one of claims 9 or 10, characterized in that: The sections (22, 23) of the at least one exit surface (13, 14) adjacent to the at least one step (21), in particular adjacent to each step (21), are inclined relative to each other so that, when installed in a motor vehicle, the angle (γ) formed by a normal (19) on at least one first section (22) of the at least one exit surface (13, 14) of the optical waveguide (11) with the longitudinal direction (17) of the vehicle is smaller than the angle formed by a normal (19) on at least one second section (23) of the at least one exit surface (13, 14) with the longitudinal direction of the vehicle.

12. The lighting device according to any one of claims 1 to 11, characterized in that: The at least one optical component is designed as a microstructured film and / or a microstructured optical lens, wherein the at least one microstructured film or the at least one microstructured optical lens is arranged, for example, between a light guide (11) and a cover lens (15).

13. The lighting device according to any one of claims 1 to 12, characterized in that: The at least one optical component is configured as an at least partially reflective reflective surface, which is arranged on a side of the light conductor (11) facing away from the cover lens (15), wherein the lighting device is configured so that light emitted from an exit surface (14) of the light conductor (11) facing away from the cover lens (15) is irradiated onto the reflective surface, is reflected by the reflective surface back to the exit surface (14) and at least partially re-enters the light conductor (11), and then the light is emitted from an exit surface (13) facing the cover lens (15) and passes through the at least one cover lens (15).

14. The lighting device according to any one of claims 12 or 13, characterized in that: The at least one microstructured film and / or the at least one microstructured optical lens and / or the reflective surface are at least partially parallel to the at least one exit surface (13, 14) of the light guide (11).

15. The lighting device according to any one of claims 1 to 14, characterized in that: The lighting device comprises a plurality of light sources which are designed as light emitting diodes and are arranged on, in particular, a common circuit board (10), wherein the light emitting diodes are preferably arranged next to one another in a longitudinal direction (L) of a light conductor (11).

Images