DE102018203860A1 - Illumination system with light collecting device - Google Patents

Abstract

The invention relates to an illumination system for an object to be illuminated (1 ", 1"') in a vehicle interior, comprising an illumination element (1, 1'), an artificial light source (2) for generating artificial light, a light collection device (3) for Collecting sunlight and at least one first optical waveguide (4), preferably an optical fiber, for establishing a light-conducting connection between the light-collecting device (3) and the illumination element (1, 1 '). The artificial light source (2) is adapted to cause a basic illumination, and the at least one first optical waveguide (4) is adapted to coupling the light collected by the light collecting device (3) and a radiation of the sunlight in the vicinity of one to enable lighting object (1 ", 1"') or in the object to be illuminated (1 ", 1"').

Description

The application relates to a lighting system for an object to be illuminated in a vehicle interior.

Moistened objects are used in vehicle interiors for both decorative purposes and for displaying information to a driver.

In addition to fittings and displays in modern vehicles often, for example, logos, decorative parts and / or footwells illuminated.

The aim of the present application is to propose a system that allows such lighting in an energy-efficient manner and at the same time allows automatic brightness adjustment to the ambient lighting.

This object is achieved by a lighting system according to claim 1. Advantageous embodiments emerge from the subclaims.

Such a lighting system comprises a lighting element with which an object to be illuminated, for example a display, a display panel, a logo or an ornament, can be illuminated. The lighting element can be, for example, a transparent or semitransparent plate, for example made of glass or plastic. The lighting element may comprise, for example, a polymethylmethacrylate (PMMA) plate or a textile fabric comprising optical fibers, or may be formed as such. The textile fabric can be shaped in three dimensions and, for example, be part of a decorative part or interior trim part. Furthermore, it is possible that the lighting element comprises both a PMMA plate and optical fibers.

Furthermore, such an illumination system comprises an artificial light source for generating artificial light, such as one or more light-emitting diodes (LEDs), for example organic light-emitting diodes (OLEDs), polymer light-emitting diodes (PLEDs) or laser diodes.

In addition, a light collecting device is provided for collecting ambient light, in particular sunlight, and at least one first optical waveguide, preferably formed as an optical fiber, for producing a light-conducting connection between the light-collecting device and the lighting element.

The artificial light source is designed to cause a basic illumination of the object to be illuminated by the illumination element.

The at least one first waveguide is designed and arranged such that it enables the ambient light collected by the light-collecting device to be coupled into the lighting element. In particular, this allows a radiation of the ambient light in the vicinity of the object to be illuminated or in the object to be illuminated. As a result, additional illumination of the object to be illuminated can be effected by the illumination element.

The proposed illumination system may, in some embodiments, further comprise at least one second optical waveguide, preferably formed as an optical fiber, for establishing a light-conducting connection between the artificial light source and the illumination element. The at least one second optical waveguide is designed to enable a coupling of the artificial light of the artificial light source into the lighting element. In particular, a radiation of the artificial light in the vicinity of the object to be illuminated or in the object to be illuminated is thus made possible to effect the basic illumination of the object to be illuminated. The radiation of the artificial light, which is coupled by the at least one second optical waveguide in the illumination element, preferably takes place in the same manner as the emission of ambient light, which is coupled by the at least one first optical waveguide in the illumination element.

The illumination element may comprise one or more further optical waveguides, which are respectively connected in a light-conducting manner to the at least one first optical waveguide and / or to the at least one second optical waveguide. In particular, the one or more further optical waveguides may be end regions of the at least one first and / or the at least one second waveguide or comprise their end regions. The one or more further optical waveguides may be formed as waveguide fibers and have the same properties as the first and / or second waveguides or other properties. For example, the first and / or second waveguides can be designed for as light as possible loss-free transport of light, while the other optical waveguides are designed to emit light in a targeted manner.

In particular, the at least one first optical waveguide and / or the at least one second optical waveguide can be flexible be formed optical fibers or be connected to flexibly formed fibers that are at least partially part of the lighting element. At least one area of the flexibly formed fibers then constitutes the further optical waveguides.

Depending on the application, it will be clear to the person skilled in the art whether it is advantageous to use regions of the first and second waveguides themselves as further waveguides in the sense of the application, or if other waveguides, for example with different properties than the first and second waveguides, as further Waveguides are used.

A radiation of light through the illumination element in the vicinity of the object to be illuminated or in the object to be illuminated can then take place, for example, in a region, preferably in an end region, of the one or more further optical waveguides with a component orthogonal to the further optical waveguide , In one embodiment, the radiation can also take place at one end of the one or more further optical waveguides.

The effect of such an arrangement is that the additional illumination is effected by means of the light-collecting device and thereby automatically stronger illumination of the object to be illuminated by the illumination element is effected at a stronger ambient lighting, in particular at a stronger solar radiation. In vehicle interiors, there is a special situation in this respect, which differs from applications in buildings, for example, that more intense illumination of the fittings or other elements that can represent an object to be illuminated, especially with stronger sunlight and a strong brightening of the vehicle interior so that the fittings or other elements can be easily read or recognized by the driver. This circumstance is exploited in the system described here. A direction of sunlight is also important to the system. The additional illumination of the object to be illuminated may be necessary, for example, when the sun hits the vehicle from the front, since the driver is then dazzled by the sun and possibly also put on sunglasses. Both require a stronger illumination of the object to be illuminated. If the object to be illuminated is displays or displays, sufficient additional illumination of the displays or displays dependent on sunlight can also be security-relevant.

Another advantage of the presented system is a high reliability, since no brightness sensors are needed and thus no computer calculations or control processes must be interposed. In the system proposed here, the sunlight itself, which requires the additional lighting, provides the additional lighting. Preferably, the system is configured, arranged and adjusted so that for different brightnesses and angles of incidence of the sunlight is automatically given a well perceptible and pleasant additional illumination of the object to be illuminated for the driver.

The color of the sunlight-dependent or ambient-light-dependent additional lighting can be adjusted by means of one or more filters. For example, it can be adapted to the color of the artificial basic lighting. This makes it possible to ensure that the visual appearance, in particular the color of the illuminated object, does not change as a result of the additional illumination. It can also be achieved, for example, that the color does not change when the ambient lighting changes, for example in a tunnel.

In order to effect a corresponding ambient light-independent or sunlight-dependent illumination of the illuminated object, the light-collecting device is preferably arranged or positioned accordingly. For example, in a situation where sunlight falls through a windshield of the vehicle, especially when that light is incident so that it can strike the driver's eyes, the light-gathering device can be positioned to collect a particularly large amount of light from the light-gathering device and thus a particularly strong one additional lighting can be provided.

For this purpose, the light-collecting device can be arranged behind, in front of or next to the windshield of the vehicle, so that sunlight falling on or through the windshield or in the vicinity of the windshield is at least partially collected by the light-collecting device. For example, the light-gathering device may be placed on the dashboard or near an A-pillar. Preferably, the light-collecting device is arranged in the interior of the vehicle.

The light collecting device may be elongated. An elongated configuration of the light-collecting device may allow advantageous positioning while maximizing the area of the light-collecting device, wherein a driver's vision is preferably minimally minimized.

In one embodiment, the light-collecting device can also be arranged on a roof of the vehicle. Preferably, such a light-gathering device is disposed in the vicinity of a translucent roof.

The light collection device may include structures for increasing light collection efficiency. For example, the light collection device may include nanostructures, such as nanocones, and / or ring reflectors.

When the lighting element is a PMMA plate, the at least one first optical waveguide may be formed, for example, for coupling in the light by connecting the end of the at least one first optical waveguide to the PMMA plate. The coupling of the light for the basic illumination in the PMMA plate, for example by light from one or more light-emitting diodes, can be effected directly, for example by LEDs correspondingly arranged on the PMMA plate, or via at least one second optical waveguide. The coupling of the light is preferably carried out at an edge of the PMMA plate. The radiation, on the other hand, then preferably takes place on a surface of the plate, that is to say in such a way that the emitted light has an orthogonal component relative to the plate. For this purpose, for example, a coating of the plate may be removed in areas or the plate may contain areas of defects.

In the case of a formed as a textile fabric lighting element, a section or sections, for. For example, the end regions of the further optical waveguides, which are connected to the at least one first and / or the at least one second waveguide, be integrated into the textile fabric or be part of the textile fabric. For example, the textile fabric may be a woven fabric into which the optical waveguides formed as further optical waveguides are woven as warp and / or weft threads.

In particular, for use in a textile fabric, but also in other embodiments, the at least one first optical waveguide and / or the at least one second optical waveguide may be formed as optical fibers and, for example, in each case a diameter of between 0.1 mm and 1 mm, preferably from between 0.2 mm and 0.5 mm. The at least one first waveguide and / or the at least one second waveguide are flexible in one embodiment. The at least one first waveguide and / or the at least one second waveguide are in one embodiment of PMMA.

As described, the at least one first optical waveguide and / or the at least one second optical waveguide may be formed as optical fibers and woven into the textile fabric. The textile fabric can then be applied to a carrier. One or more other optical waveguides connected to the at least one first optical waveguide and / or to the at least one second optical waveguide may also be woven into the fabric and may then be configured to emit light in an emitter-forming region of the respective other optical waveguide which lies in the textile fabric, for example in the entire interwoven section or in a part or parts of this section. The at least one first and / or the at least one second waveguide and, in some embodiments, a further region of the one or more further optical waveguides then serve as the light conduit from the light collection device to the region of the one or more further optical waveguides formed for emitting preferably designed so that there as little as possible or no light is emitted, but the light is transported loss-free as possible in the area formed for emitting. A light emission can be achieved in the area to be emitted, for example by introducing impurities into the optical waveguides. Defects can be achieved, for example, by changes in a surface of an optical waveguide or an optical fiber. For this purpose, the surface may be roughened area by area, or it may, for example, have a coating with a different refractive index, or a coating may be removed in certain areas.

The one or more further optical waveguides, in particular if they are formed as optical fibers, may be arranged as part of the textile fabric parallel or orthogonal to one another. They can be in the same position or in different layers of the textile fabric. The radiation of the light of the one or more further optical waveguides is carried out in one embodiment at least in a region of the textile fabric, preferably with a component orthogonal to the respective optical waveguide and / or with a component orthogonal to a surface of the textile fabric

A plurality of other optical waveguides may be substantially parallel optical fibers at least in the region to be emitted, in which the plurality of further optical waveguides are configured to emit light. In one embodiment are juxtaposed further optical waveguides alternately connected to first and second optical waveguides. In an embodiment in which the plurality of further optical waveguides are formed as fibers, a distance between adjacent further optical waveguides in this area is at most 1 mm. An advantage of this arrangement is that it is hardly or not at all distinguishable for a human observer with further optical waveguides arranged in this way whether the light is emitted by the first waveguide fiber or by the second waveguide fiber. As a result, the object to be illuminated for the observer is essentially only lighter or darker and otherwise changes little or not in its appearance. In an embodiment in which the lighting element comprising a plurality of further waveguides serves to directly illuminate an object to be illuminated, for example a direct illumination of a display, a distance between two adjacent further optical waveguides, one with a first optical waveguide and one with a first optical waveguide second optical waveguide is connected, 1 mm or less, preferably 0.5 mm or less.

However, embodiments are also possible in which one or more further optical fibers, each of which is connected to a first optical waveguide and one or more further optical fibers, each of which is connected to a second optical waveguide, have a different course, so that, for example, areas are created that are lit only by the basic lighting and other areas arise that are illuminated only by the additional lighting. This may be desired in particular for decorative parts.

In one embodiment, the one or more further optical waveguides have a predetermined shape, for example a shape of a logo, at least in the region in which the further optical waveguides are configured to emit light. The one or the other optical waveguides, in particular if they are designed as optical fibers, can be produced for this purpose in an injection molding process or another primary molding process with the corresponding shape. In another embodiment, an optical disk, for example a PMMA disk, has a predetermined shape as described above.

In one embodiment, the illumination system comprises a plurality of first optical waveguides and a plurality of second optical waveguides, wherein the further optical waveguides connected to the first optical waveguides and the further optical waveguides connected to the second optical waveguides are at least in the region in that they are designed to emit light are arranged according to a predetermined scheme. For example, the further optical waveguides connected to the first optical waveguides and those connected to the second optical waveguides may be alternately arranged in this region. The further optical waveguides are, for example, end regions of the first and second optical waveguides designed as optical fibers.

In various embodiments, light from a light collection device or from a plurality of light collection devices can be coupled into a single illumination element or into a plurality of illumination elements.

The individual objects to be illuminated can be identical or different. Likewise, the individual light-collecting devices can be identical or different and can be mounted at different locations of the vehicle, for example on the roof and / or on the dashboard and / or on the side or rear of the vehicle.

The optical waveguides are preferably flexible optical fibers. But also optical waveguides, which are integrated in an optical film or in an optical disk, are possible.

Exemplary embodiments of the invention can be found in the figures.

• 1a ein anmeldungsgemäßes Beleuchtungssystem mit ersten und zweiten optischen Wellenleitern und einem als textiles Flächengebilde ausgebildeten Beleuchtungselement,
• 1b einen Schnitt durch das Beleuchtungselement aus 1a,
• 2 ein anmeldungsgemäßes Beleuchtungssystem mit ersten optischen Wellenleitern, zum Einkoppeln von Licht in ein als PMMA-Platte ausgebildetes Beleuchtungselement,
• 3 eine Außenansicht eines Fahrzeugs mit einem Beleuchtungssystem gemäß der Anmeldung,
• 4 eine Innenansicht des Fahrzeugs aus 3,
• 5 eine andere Ausführung der Konfiguration aus 1 und
• 6 eine andere Ausführungsform der Konfiguration aus 2.

Show, in each case schematically,

• 1a an illumination system according to the application with first and second optical waveguides and a lighting element formed as a textile fabric,
• 1b a section through the lighting element 1a .
• 2 an according to the application lighting system with first optical waveguides, for coupling light in a PMMA plate designed as lighting element,
• 3 an external view of a vehicle with a lighting system according to the application,
• 4 an interior view of the vehicle 3 .
• 5 another embodiment of the configuration 1 and
• 6 another embodiment of the configuration 2 ,

1a shows a lighting system according to the application, with a lighting element 1 . an artificial light source 2 , a light-collecting device 3 , first optical waveguide 4 and second optical waveguide 5 ,

The first optical waveguides 4 extend from the light collection device 3 where collected sunlight into the first waveguide 4 is fed into the lighting element 1 , The optical waveguides are preferably flexible optical fibers, but also optical waveguides integrated in or on an optical film or plate are possible. In another embodiment, the optical waveguides and the light collection device are integrally formed. The second optical waveguide 5 are formed as optical fibers and at the artificial light source 2 in a ferrule 2 ' clamped, by means of which the artificial light in the second waveguide 5 is fed. The second optical waveguides extend from the ferrule 2 ' into the object to be illuminated 1 , The second optical waveguides may also be integrated in or on an optical film or optical disk or else on a chip. However, because of their flexibility, flexible optical fibers are preferred. The first waveguides 4 and the second waveguides 5 are designed to transport the respectively fed light as lossless as possible to or through the lighting element, up to the object to be illuminated, to effect an artificial basic lighting or an external light-fed additional illumination of the object to be illuminated. The lighting element 1 comprises a plurality of further optical waveguides in the sense of the application, which are designed to emit light. It can be waveguides which are light-conductively connected to the first and second optical waveguides, for example formed as fibers, or they can be the end regions of the first and second optical waveguides. In the embodiment shown in the figure, the first waveguides 4 and the second waveguides 5 extended to the lighting element. Thus, the end portions of the first optical waveguides 4 and the second optical waveguide 5 which are connected to the first optical waveguides and the second optical waveguides, which are further optical waveguides. The first waveguides 4 and second waveguide 5 are designed to emit light in the end regions of the fibers lying within the lighting element, corresponding to their function as further waveguides. The artificial light source 5 is designed as an LED, for example as an OLED. The light collecting device 3 is elongated to be mounted in a vehicle such that a driver's view is not restricted but sufficient area is available to collect enough light for additional lighting.

Exemplary are two first optical waveguides 4 and three second optical waveguides 5 , each formed as fibers shown. The first and second waveguides 4 . 5 extend in the end regions in which they represent the further waveguide, substantially parallel to each other and are arranged alternately. But they can also be arranged according to a different scheme. Neighboring first and second waveguide fibers 4 . 5 For example, you may have a distance of 1 mm or less from each other in this area. The first and second waveguide fibers 4 . 5 are in the end areas with weaving threads 1.1 interwoven and are therefore part of a textile fabric.

One of the web threads 1.1 is with the reference numeral 1.1 ' marked. Along the weaving thread 1.1 ' is indicated by a dashed line a section A. Along this section A is in 1b a cross section through the fabric shown.

The first and second optical waveguides 4 . 5 are preferably flexible. For example, they can each have a diameter of between 0.1 mm and 1 mm or a diameter of between 0.2 mm and 0.5 mm. The textile fabric may in particular be part of a decorative part and applied to a carrier.

As part of one or more textile fabrics, the first waveguides 4 and the second waveguides 5 in other embodiments, in other angles, for example, perpendicular to each other, be arranged. They can be in different layers of a textile fabric.

The basic lighting and the additional lighting can, for example, illuminate or illuminate an ornament or a logo. In some embodiments, the radiation of the light is orthogonal to a surface of the object to be illuminated 1 , For example, designed as a textile fabric to be illuminated object 1 ,

In different embodiments, a different number of first and second waveguide fibers 4 . 5 be used.

The object to be illuminated 1 may be configured in other embodiments as a display or display.

1b shows a cross section through the in 1a shown, formed as a textile surface object, lighting element 1 , The cross section runs along the section A out 1a and along the weaving thread 1.1 ' , The first optical waveguides 4 and the second optical waveguides 5 be from the weaving thread 1.1 ' interwoven alternately, leaving the weaving thread 1.1 ' above the second optical waveguide formed as fibers 5 and below the first optical waveguide formed as fibers 4 runs. For the weaving thread 1.1 ' adjacent web threads behave in the in 1a example shown exactly the opposite. But it may be provided in other embodiments, other Webfadenverläufe. It may be in the textile sheet product in addition to the parallel first and second optical waveguide fibers 4 . 5 also be provided to the waveguide fibers parallel fibers or bundles of fibers, which are woven threads 1.1 be woven around. These further fibers may be either optical fibers or other, for example textile fibers. The formed as fibers optical waveguide 4 . 5 and the other fibers may be arranged and interwoven alternately or according to other schemes.

2 shows an embodiment of a lighting system in which a trained as a PMMA plate lighting element 1' is provided.

The lighting element 1' is made of artificial light sources 2 illuminated, for example by backlighting or by light is fed into the PMMA plate. In the figure are three artificial light sources 2 shown, but it can also be provided a higher or lower number of artificial light sources. A lighting, for example, feeding light or backlight, using the artificial light sources 2 provides a basic illumination of the object to be illuminated by the lighting element 1' , Furthermore, the object to be illuminated by the lighting element 1' by means of first waveguide fibers 4 in which sunlight is fed, additionally illuminated, for example by backlighting or by feeding light into the PMMA plate. The sunlight is detected by means of the light collecting device 3 collected and preferably substantially lossless by the first optical waveguide fibers 4 up to the lighting element 1' and further in the lighting element 1' transported. At ends of the first optical waveguide, for example, in the lighting element 1' extend, the collected and transported sunlight from the first optical waveguide fibers 4 radiated and fed into the PMMA plate and transported in the direction of an object to be illuminated, to effect additional illumination of the object to be illuminated, for example by backlighting. The radiation of the light fed into the PMMA plate for illuminating the object to be illuminated can be effected, for example, by a modification of the surface of the PMMA plate, such as a coating.

In the 2 are two first waveguide fibers 4 shown, but there are also versions with more or less first waveguide fibers 4 possible. Furthermore, it is also possible to have one or more second waveguide fibers 5 that the artificial light sources 2 or a single artificial light source 2 with the lighting element 1' photoconductive, provide, rather than the artificial light sources 2 as shown directly on the object to be illuminated 1' provide.

The object to be illuminated can be designed in different embodiments, for example, as a display or display or as a decorative part or ornament, for example.

In 3 is a possible arrangement of light collecting devices 3 ' . 3 ' shown on a vehicle. The vehicle is shown in an external view from the front. The light collecting devices 3 ' . 3 ' are in the example near a windshield 6 attached to the vehicle. In particular, the light collecting devices 3 ' . 3 ' Mounted so that they then collect sunlight when this from the front of the windshield 6 meets. The sunlight hits the windscreen in this way 6 Thus, an interior of the vehicle is strongly illuminated by the sunlight and a behind a steering wheel 8th vehicle sitting driver possibly blinded. These circumstances make additional lighting of - for example, as in the 1 and 2 trained - to be illuminated objects 1 . 1' required in the vehicle interior, so that the driver these objects to be illuminated 1 . 1' can continue to recognize, especially when the driver is wearing sunglasses due to the sun. The corresponding additional lighting is automatically provided with the described arrangement as soon as it is needed.

The light collecting devices 3 ' . 3 ' are elongated to minimize the driver's view as little as possible. A light collection device 3 ' is arranged in the example in an area on a dashboard.

The advantage of the arrangement 3 is that this area is largely unused in many vehicles and sufficient space for the light collection device 3 ' offers. Two light collecting devices 3 ' are in the example right and left behind the windshield 6 of the vehicle near an A pillar of the vehicle. But you can also be placed in front of the windshield.

In various embodiments, all or only one or two of the light-harvesting devices shown may be used 3 ' . 3 ' be used. Additionally or alternatively, differently arranged light collecting devices may be used. Lichtsammeivorrichtungen can be arranged for example on a roof of the vehicle.

Each of the light gathering devices shown 3 ' . 3 ' like the light-harvesting devices 3 from the 1 and 2 in lighting systems according to the 1 and 2 or used in differently configured lighting systems. In particular, also several of the light collecting devices 3 . 3 ' for collecting sunlight for a single lighting element 1 . 1' be used. It can also be a single of the light-collecting devices 3 . 3 ' for collecting sunlight for multiple lighting elements 1 . 1' be used.

In 4 is an interior view of the vehicle with lighting system off 3 shown. The interior view forms part of the driver-visible area of the vehicle. The backs of the light-gathering devices 3 ' . 3 ' are for the driver on the side edge of the windshield, on the A-pillar, or lower edge of the windshield 6 , on the dashboard 7 , visible, noticeable. However, the light harvesting devices do not disturb a view of the road. Behind the wheel 8th are designed as ads designed to be illuminated objects 1" for which by means of the proposed system a basic lighting as well as an additional illumination by the light collecting devices 3 ' . 3 ' is effected. The displays are, as described, even with strong interior lighting, such as strong backlight in a sunshine from the front, clearly visible to the driver. In a passenger area is a decorative part with an object designed as an ornament to be illuminated 1"' shown. The designed as an ornament to be illuminated object 1"' is lit with a weak basic lighting to have a high-quality appearance but not to distract the driver. In strong interior lighting is designed as an ornament to be illuminated object 1"' is more illuminated by the proposed lighting system to continue to be perceived. The designed as an ornament to be illuminated object may include, for example, a logo of the vehicle manufacturer.

5 shows a similar arrangement as in 1 shown. The same reference numerals designate the same objects.

6 shows a similar arrangement as in 2 , The same reference numerals designate the same objects. Here is a front view of a trained as a PMMA plate lighting element 1' shown, and the artificial light sources 2 are arranged on the PMMA plate. The first optical waveguides 4 continue behind the PMMA plate in a textile fabric, which continues to be powered by the artificial light sources second waveguide 5 may include (not shown).

LIST OF REFERENCE NUMBERS

1, 1 '

lighting element

1 ", 1" '

Object to be illuminated

1.1, 1.1 '

weaving threads

2

Artificial light source

2 '

ferrule

3, 3 ', 3 "

Light collection device

4

First optical waveguide

5

Second optical waveguide

6

Windshield

7

dashboard

8th

steering wheel

9

A column

Claims (10)

Lighting system for an object to be illuminated (1 ", 1" ') in a vehicle interior, comprising a lighting element (1, 1 ') for emitting light, an artificial light source (2) for generating artificial light, - A light collecting device (3) for collecting ambient light at least one first optical waveguide (4), for producing a light-conducting connection between the light-collecting device (3) and the illumination element (1, 1 '), in which - The artificial light source (2) is adapted to cause a basic lighting by the lighting element (1, 1 ') and - The at least one first optical waveguide (4) is adapted to allow coupling of the light collected by the light collecting device (3) ambient light in the lighting element (1,1 '), thereby causing additional illumination by the lighting element. Lighting system after Claim 1 characterized by at least one second optical waveguide (5) for producing a photoconductive connection between the artificial light source (2) and the illumination element (1, 1 '), wherein the at least one second optical waveguide (5) is adapted for coupling of the artificial Light of the artificial light source (2) in the lighting element (1, 1 ') to effect. Illumination system according to one of the preceding claims, characterized in that the illumination element (1, 1 ') is formed as a PMMA plate, as a fabric comprising optical fibers or as a composite of a PMMA plate and optical fibers. Illumination system according to one of the preceding claims, characterized in that the object to be illuminated (1 ", 1"') is backlit by the light emitted by the illumination element (1, 1'). Illumination system according to one of the preceding claims, wherein the at least one first optical waveguide (4) and / or the at least one second optical waveguide (5) is a flexibly formed optical fiber or flexibly formed optical fibers or is connected to a flexibly formed fiber or are connected to flexibly formed fibers which is at least partially part of the lighting element (1, 1 ') is / are. Lighting system according to one of Claims 3 to 5 characterized in that the illumination element (1, 1 ') comprises the optical fibers, wherein the optical fibers are part of the fabric and wherein the optical fibers are arranged parallel or orthogonal to each other, in the same layer or in different layers of the textile fabric and wherein a radiation direction of the light at least in a region of the textile fabric has a component orthogonal to the respective optical fiber and / or a component orthogonal to a surface of the textile fabric. Lighting system according to one of Claims 5 or 6 , characterized in that the optical fibers are at least in a region in which they are adapted to emit light, arranged substantially parallel to each other and preferably have a distance of at most 1 mm to each other. Lighting system according to one of Claims 5 to 7 , characterized in that the optical fibers, at least in the region in which they are adapted to emit light, are arranged according to a predetermined pattern, preferably such that fibers connected to the at least one first optical waveguide (4) and to the at least a second optical waveguide (5) connected fibers are arranged alternately. Lighting system according to one of the preceding claims, characterized in that the Lichtsammeivorrichtung (3) is arranged on a roof of a vehicle or behind or next to a windscreen (6) of the vehicle is arranged so that sunlight, which on or through the roof, or on or falling through the windscreen or near the windshield, at least partially collected by the light collecting device (3). Lighting system according to one of the preceding claims, wherein the light-collecting device (3) is elongated.

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