AT520399A1 - LIGHTING DEVICE AND / OR SIGNALING DEVICE FOR A MOTOR VEHICLE - Google Patents

Abstract

Lighting device and / or signaling device for a motor vehicle, comprising: - at least one light guide (100) having a Lichteinkoppelstelle (110), a supply section (120), a coupling-out section (130) and a light guide end (140), and at least one of the at least one light guide (100) associated light source (101) - at least one aperture component (200) having a diaphragm surface (210), which is arranged after the light guide (100), - in the light exit direction after the diaphragm component (200) arranged light disk (300 ) with a Lichteinkoppelstelle (310) and at least one of the lens (300) associated light source (301), wherein the diaphragm surface (210) has an at least partially translucent diaphragm portion (211) associated with the at least one light guide (100) and in the light exit direction this is arranged.

Description

Summary

Lighting device and / or signaling device for a motor vehicle, comprising:

- At least one light guide (100) with a light coupling point (110), one

Supply section (120), a coupling-out section (130) and a light guide end (140), and at least one light source (101 assigned to the at least one light guide

- at least one diaphragm component (200) with a diaphragm surface (210) which is arranged after the light guide (100),

- A lens (300) arranged in the light exit direction after the aperture component (200) with a light coupling point (310) and at least one light source (301) assigned to the lens (300), the aperture surface (210) having an at least partially translucent aperture section (211 ) which is assigned to the at least one light guide (100) and is arranged downstream of it in the light exit direction.

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Lighting device and / or signaling device for a motor vehicle

The invention relates to a lighting device and / or signaling device for a motor vehicle, comprising:

- At least one light guide with a light coupling point, a feed section, a coupling section and a light guide end, and at least one light source assigned to the at least one light guide, which can feed light into the light guide via the light coupling point and the subsequent feed section, and wherein light fed into the light guide by means of in the outcoupling section of the at least one light guide, outcoupling elements exit via a light exit region of the outcoupling section,

at least one diaphragm component with a diaphragm surface, the diaphragm component being arranged after the light guide in the region of the light coupling point and the feed section of the at least one light guide in the direction of the light emitted by the at least one light guide - hereinafter referred to as light exit direction.

- A light disc arranged in the light exit direction after the diaphragm component with a light coupling point and at least one light source assigned to the light plate, which can feed light via the light coupling point of the light plate, with light fed in via the light plate essentially emerging in the light exit direction, and the arrangement of the light plate in relation to the at least one light guide allows at least partial transmission of the light emitted by the at least one light guide.

Furthermore, the invention relates to a motor vehicle headlight, which comprises at least one lighting and / or signaling device according to the invention.

Light guides are often used in motor vehicle headlights, into which the light from a light source, in particular an LED, is fed in order to thereby achieve a desired one

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To be able to implement light distribution or light distributions and / or (a) signaling function (s) with simple means.

The structure and function of a typical motor vehicle headlight with an optical fiber are shown in DE 10 2006 035 842 A1, among others. A possible embodiment describes a vehicle lamp, in particular a side flashing lamp, which comprises at least one elongated light guide and has at least one area on the side of the light guide with a thinner cross section, the side area or areas being formed completely or at least in a predetermined partial area and thus serve as an aperture.

The prior art cited in the above-mentioned document also shows a diaphragm which is arranged in front of a light coupling point and the subsequent feed area of a light guide in order to cover said area.

In particular, the feed section of light guides is generally used to mix the light in order to achieve a homogeneous coupling of light from the beginning of the field of view or the light exit surface of a light guide, the light not being coupled out from the feed section and therefore generally not having any coupling elements.

However, since the luminous area of the light guide is abruptly limited by a re-arranged aperture, the light impression of the light guide appears to be cut off to a certain extent, which prevents a homogeneous light impression.

Another disadvantage of this arrangement and the fact that a part or section of a light guide is not used for light distribution or lighting impression is the additional space that is required for this.

It is an object of the invention to provide an improved lighting and / or signaling device.

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This object is achieved in that the diaphragm surface has an at least partially translucent diaphragm section which is assigned to the at least one light guide and is arranged downstream of the light guide.

The outline of this partially translucent panel section can be formed by a simple geometric curve, for example a circle, triangle, square, etc., but can also reproduce characters or complex contours so that, for example, homogeneously luminous logos are made possible.

It can also be provided that the diaphragm surface of the at least one diaphragm component is at least partially, at least partially translucent, the diaphragm surface having a wall thickness profile in the direction of the light coupling point of the lens.

The diaphragm surface is the surface that is essentially set up to influence or weaken the light emerging from the light guide in its further propagation, preferably in the light exit direction of the light guide.

By “at least partially translucent it is meant that the aperture surface has a transmittance less than 1 and thereby regulates the light emerging from the light guide or weakens it with regard to the transmittance.

A completely opaque or opaque medium would have a transmittance of zero or essentially zero.

On the other hand, media that leave the intensity of the transmitted light unchanged have a transmittance of one or essentially one.

Areas of the diaphragm surface can have a transmittance equal to one.

For example, it can be provided that the diaphragm surface has a type of transmittance curve.

It can also be provided that the entire panel component is at least partially translucent.

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It should be pointed out that the above descriptions with regard to the definition “at least partially translucent can also apply to the aperture section.

It is advantageously provided that the wall thickness of the diaphragm surface increases in the direction of the light coupling point of the lens.

The diaphragm section can advantageously have a wall thickness profile in the direction of the light guide end, the wall thickness decreasing in the direction of the light guide end.

It can also be provided that the diaphragm section has a wall thickness profile in the direction of the light guide end, the wall thickness increasing in the direction of the light guide end.

The course of the wall thickness is generally adapted to the luminosity and the shape of the light guide.

It may be expedient if the outcoupling elements are designed as prisms in the outcoupling section of the at least one light guide.

It can also be advantageous if the decoupling elements in the decoupling section have a size and / or distance profile.

It is advantageously provided that outcoupling elements are arranged in the feed line section in order to enable the light fed in by the at least one light source to escape in a targeted manner away from the outcoupling section.

In addition, it can be advantageous if the decoupling elements in the feed section are designed as cylindrically shaped grooves.

It may be expedient if the size or the dimensions of the decoupling elements in the feed section increases along the light guide in the direction of the end of the light guide.

However, it can also be advantageous if the size or the dimensions of the coupling-out elements decrease in the feed section along the light guide in the direction of the end of the light guide.

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In an expedient embodiment, it can be provided that the at least one light source of the at least one light guide is designed as an LED.

It can also be favorable if the at least one light source of the lens is designed as an LED.

In general, the at least one light source can be formed from one or more LEDs, which can be controlled and dimmed independently of one another.

This also applies to the use of multiple light sources; they are only assigned to the light guide and / or the lens.

In a further embodiment, the device can comprise at least two light guides.

It is advantageous if the diaphragm surface of the at least one diaphragm component is two

Includes diaphragm sections, which are each assigned to a light guide.

It can further be provided that the light guides can be controlled independently of one another.

Advantageously, the lens can have scattering elements for scattering or distributing the light coupled in by the at least one light source.

It is advantageous if the device comprises a housing with a housing cover.

It can be provided that the light source assigned to the at least one light guide and the lens is at least two mutually different light sources.

The lens can advantageously have at least one at least partially translucent light exit window.

It can also be provided that the housing cover has at least one at least partially translucent light exit window.

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It can be advantageous if a cover film is arranged after the lens in the light exit direction, the cover film having opaque and at least partially transparent areas. These partially translucent areas in turn function as light exit windows, as previously described.

An objective lighting and / or signaling device can be provided for generating a flashing light distribution or flashing light function, a low-beam light distribution and / or a charge status display of a vehicle, in particular an electric motor vehicle.

The invention is explained in more detail below with reference to drawings. Here show:

1 shows an exemplary lighting and / or signaling device according to the invention,

FIG. 2 shows an exploded view of the example from FIG. 1,

3 shows a cross-sectional view of section II-II of the example from FIG. 1,

4 shows a detailed view of an area from FIG. 3,

FIG. 5 shows a cross-sectional view of section III-III from FIG. 3 or FIG. 4,

6 shows an exemplary light guide, and

Fig. 7 is a detailed view of Fig. 6 from above.

1 shows an exemplary embodiment of a lighting and / or signaling device 1 according to the invention in an assembled form.

FIG. 2 shows the exemplary embodiment of the device from FIG. 1, comprising a light guide 100 with a light coupling point 110, a coupling section 130 and a light guide end 140, and a light source 101 assigned to the light guide 100, which light into the light guide 100 via the light coupling point 110 and can feed a subsequent lead section 120 and, in the example from FIG. 2, is designed as an LED

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P14855, wherein light fed into the light guide 100 exits via a light exit area by means of coupling elements 131 arranged in the coupling section 130 of the light guide 100.

The outcoupling elements 131 of the outcoupling section 130 in the example shown in the figures extend over the entire outcoupling section 130 to the end of the light guide 140, as can be seen in FIG. 6, an arrangement of the outcoupling elements 131 not extending over the entire outcoupling section 130 being conceivable ,

Furthermore, the decoupling elements 131 of the decoupling section 130 can be designed as prisms, as can be seen in FIG. 7.

Furthermore, FIG. 2 shows a light emitted in the direction of the one light guide - hereinafter referred to as light exit direction, which is shown, among other things, in FIGS. 3 and 4, with a lens 300 connected downstream with a light coupling point 310 and a light source 301 assigned to the lens 300, preferably as LED executed, which can feed light through the light coupling point 310 of the lens 300, shown. The light fed in via the light coupling point 310 of the light disk 300 exits via the light disk 300, the arrangement of the light disk 300 in relation to the light guide 100 permitting at least partial irradiation of the light emitted from the light guide 100 and with the light generated from the light disk 300 and emitted light forms a common light distribution or a common lighting impression on the lens 300.

The lens 300 can also contain scattering elements 320, which are shown in FIG. 4 and can be arranged, for example, in the light exit direction on the back of the lens 300 in order to distribute or scatter the light coupled in from the light source 301 in the lens 300 and in Decouple light exit direction.

The lens 300 can also have light exit windows 311 in the light exit direction, which are at least partially translucent. This enables the implementation of illuminated design elements, pictograms, logos and the like.

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To implement such light exit windows 311, for example, a cover film in

Light exit direction can be arranged after the lens 300. This cover film can preferably have opaque and at least partially translucent areas, the at least partially translucent areas the aforementioned

Light exit window 311 are.

For example, the housing cover can also have such light exit windows 311, it being possible for the emitted light from the light pane 300 and the light guide 100 to exit exclusively through the light exit windows 311.

Likewise, the light exit windows 311 can be designed as an Earbfilter in order to generate a colored logo on the lens 300, which stands out in terms of design from the lens. In this case, the prefabricated logo can be attached to the lens 300 in lorrn an eolie.

It should be noted that the above-mentioned examples with regard to the light exit windows 311 are not final embodiments.

In order to produce a homogeneous lighting impression of the common light distribution, between the light guide 100 and the light pane 300 there is a diaphragm component 200 with a diaphragm surface 210 which is at least partially, at least partially translucent, and in the area of the light coupling point 110 and the feed section 120 of the light guide 100 is arranged.

The diaphragm surface 210 here is the surface which is essentially set up to influence or weaken the light emerging from the light guide 100 in its further propagation, preferably in the light exit direction of the light guide 100.

In the example shown in the Eiguren, the entire diaphragm surface 210 is partially made translucent, which means that the diaphragm surface 210 has a transmittance less than 1, which regulates the amount of light emerging from the light guide 100 or from the feed section 120.

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Furthermore, the diaphragm surface 210 has a diaphragm section 211 which is assigned to the light guide 100 and substantially covers or covers it, the diaphragm section 211 also being partially translucent.

As can be seen in FIG. 2, the diaphragm surface extends in the direction of the light coupling point 310 of the lens 300 and has a wall thickness profile in the direction of the light coupling point 310 of the lens 300, which is shown by way of example in FIG. 5.

In general, the diaphragm surface 210 covers the light coupling point 110 of the light guide 100 and extends in the direction of the light coupling point 310 of the light pane 300, the diaphragm surface 210 not having to extend entirely to the light coupling point 310 of the light plate 300.

Since a common, homogeneous lighting impression of the entire lens 300 is sought, the light coupling points 110, 310 and their arrangement with respect to one another represent particularly critical areas. Without a targeted weakening of at least one of these areas or locations by the aperture component 200, the lighting impression of the lens 300 would have bright or radiating areas or locations.

With the help of the at least partially, at least partially translucent, diaphragm surface 210 and its wall thickness profile, which increases in the direction of the light coupling point 310 of the lens 300, as shown in FIG. 5, a smooth transition of the brightness gradients appearing on the lens 300 through the lens 300 is achieved the light coupling point 310 emerging and distributed in the lens 300 and the light transmitted through the lens of the light guide 100 are generated so that the lighting impression of the lens 300 appears homogeneous.

The cross-sectional view of the diaphragm component 200 shown in FIG. 5 shows different wall thicknesses of the diaphragm surface 210, which are identified by do, di and d ₂ , the exemplary wall thickness curve from FIG. 5 in the direction of the light coupling point 310 of the lens 300 with do di <d ₂ can be formulated.

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For an improved homogenization of the lighting impression of the lens 300, the aperture section 211 can also have a wall thickness profile.

Depending on the shape of the light guide 100 in the area of the light coupling point 110 and the feed section 120 in relation to the desired light exit direction, the wall thickness of the aperture section 211 can increase or decrease in the direction of the light guide end 140.

If the light exit direction from a curved feed section 120 runs essentially parallel to the desired light exit direction of the coupling section 130 of the light guide 100, as shown in FIG. 2, it may be advisable to make the wall thickness profile of the screen section 211 decreasing towards the light guide end 140.

In the case of a light exit direction of the light coupling point 110 which is essentially orthogonal to the desired light exit direction of the coupling section 130 of the light guide 100, an increasing wall thickness profile of the diaphragm section 211 in the direction of the light guide end 140 may be desirable.

In principle, the wall thickness or the wall thickness profile of the diaphragm surface 210 is matched to the light intensity of the light guide 100 used in each case and the lens 300 and the corresponding light sources 101, 301.

In order to selectively couple light out of the supply line section 120, outcoupling elements 121 can be arranged in the supply line section 120, as shown in FIGS. 6 and 7.

Since the feed section of a light guide generally ensures that the light that is fed in is mixed, the outcoupling elements 121 in the feed section 120 of the light guide 100 are designed in such a way that, despite the targeted coupling out of light in the feed section 120, the mixing of the light is not significantly influenced, so that for the light prepared in the coupling-out section 130 in the sense of intermixing experiences essentially no significant losses or changes.

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For this purpose, the coupling-out elements 121 of the feed section 120 are designed in the form of cylindrical grooves, since such a shape is less directed

Radiation characteristic has as a prism usually used for the coupling out of light, which are arranged for example in the coupling section 130 of the light guide 100, as shown in FIG. 7.

If the outcoupling elements 121 are arranged in the supply section 120 only over a short section along the supply section 120, the distance between the individual outcoupling elements 121 and their size or the radius of the cylindrical grooves can be the same.

In this case, the distance between the individual decoupling elements 121 of the supply area can be selected such that it corresponds to the distance between the individual decoupling elements 131 of the decoupling section 130, for example prisms.

When the light is decoupled over a longer section or area of the feed section 120, the size and / or the radius of the cylindrical grooves 121 and the depth of the grooves 121 in the feed section 120 can be carried out continuously, the dimensions such as size, distance between the individual grooves, radius of the cylindrical grooves and / or depth along the light guide 100 in the direction of the light guide end 140 increasing or decreasing.

Furthermore, the device can comprise a housing 10 containing the light guide 100, the lens 300, the light sources 101, 301 and the diaphragm component, with a housing cover 20, which are shown for example in FIGS. 1 and 2.

Apart from the exemplary embodiment of the device 1 with an optical waveguide 100 shown in the figures, two optical waveguides 100 can also be provided, the diaphragm surface 210 having a further diaphragm section 211 for this purpose.

Furthermore, the light guides 100 can be controlled independently of one another.

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Reference character list

1... contraption 10 ... casing 20 ... housing cover 100 ... optical fiber 101,301 ... light source 110 ... Lichteinkoppelstelle 120 ... lead portion 121 ... Coupling element of the feed section 130 ... Auskoppelabschnitt 131 ... Decoupling element of the decoupling section 140 ... Optical fiber end 200 ... Aperture member 210 ... aperture area 211 ... shutter section 300 ... Lens 310 ... Light coupling point of the lens 311 ... Light emission window 320 ... scatterbars

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Claims (22)

claims 1. A lighting device and / or signaling device for a motor vehicle, comprising: - At least one light guide (100) with a light coupling point (110), one Supply section (120), a coupling-out section (130) and a light guide end (140), and at least one light source (101) assigned to the at least one light guide, which light into the light guide (100) via the light coupling point (110) and the subsequent supply section (120 ) can feed in, and wherein light fed into the light guide (100) exits via a light exit region of the coupling-out section (130) by means of coupling-out elements (131) arranged in the coupling-out section (130) of the at least one light-guide (100), - At least one diaphragm component (200) with a diaphragm surface (210), the diaphragm component (200) in the area of the light coupling point (110) and the feed section (120) of the at least one light guide (100) in the direction of the at least one a light guide (100) of emitted light - hereinafter referred to as light exit direction - is arranged after the light guide (100), characterized in that the diaphragm surface (210) has an at least partially translucent diaphragm section (211) which connects the at least one light guide (100) assigned and arranged in the light exit direction after this. 2. Device according to claim 1, characterized in that the device further comprises a light disc (300) arranged in the light exit direction after the diaphragm component (200) with a light coupling point (310) and at least one light source (301) assigned to the light disc (300) Which light plate (300) can feed light through the light coupling point (310) of the light plate (300), with light fed in via the light plate (300) emerging essentially in the light exit direction, and wherein the arrangement of the light plate (300) in relation to the at least at least one light guide (100) 14/26 P14855 enables partial irradiation of the light emitted by the at least one light guide (100). 3. Device according to claim 2, characterized in that the diaphragm surface (210) of the at least one diaphragm component (200) is at least partially, at least partially translucent, the diaphragm surface (210) having a wall thickness profile in the direction of the light coupling point (310) of the lens (300). 4. The device according to claim 1, characterized in that the diaphragm section (211) is designed such that homogeneously illuminated characters or logos are made possible. 5. Device according to one of claims 1 to 4, characterized in that the diaphragm section (211) has a wall thickness profile in the direction of the light guide end (140), the wall thickness decreasing or increasing in the direction of the light guide end (140). 6. Device according to one of claims 1 to 5, characterized in that the outcoupling elements (131) in the outcoupling section (130) of the at least one light guide (100) are designed as prisms. 7. Device according to one of claims 1 to 6, characterized in that the decoupling elements (131) in the decoupling section (130) have a size and / or distance profile. 8. Device according to one of claims 1 to 7, characterized in that coupling elements (121) are arranged in the feed section (120) in order to enable a targeted exit of the light fed in by the at least one light source (101) away from the coupling section (130) , 9. The device according to claim 8, characterized in that the outcoupling elements (121) in the feed section (120) are designed as cylindrically shaped grooves. 15/26 P14855 10. The device according to claim 8 or 9, characterized in that the size or the dimensions of the decoupling elements (121) increases or decreases in the feed section (120) along the light guide in the direction of the light guide end (140). 11. The device according to one of claims 1 to 10, characterized in that the at least one light source (101) of the at least one light guide (100) and the lens (300) is designed as an LED. 12. Device according to one of claims 2 to 11, characterized in that the at least one light source (301) of the lens (300) is designed as an LED. 13. Device according to one of claims 1 to 12, characterized in that the device comprises at least two, preferably exactly two light guides (100). 14. The device according to claim 13, characterized in that the diaphragm surface (210) of the at least one diaphragm component (200) comprises two diaphragm sections (211), each of which is assigned to a light guide (100). 15. The apparatus according to claim 13 or 14, characterized in that the light guides (100) are independently controllable. 16. Device according to one of claims 2 to 15, characterized in that the lens (300) has scattering elements (320) for scattering or distribution of the light coupled in by the at least one light source (301). 17. Device according to one of claims 1 to 16, characterized in that the device comprises a housing (10) with a housing cover (20). 18. Device according to one of claims 2 to 17, characterized in that the light source assigned to the at least one light guide and the lens are at least two mutually different light sources. 19. Device according to one of claims 2 to 18, characterized in that the lens (300) has at least one at least partially translucent light exit window (311). 16/26 P14855 20. Device according to one of claims 17 to 19, characterized in that the Housing cover (20) has at least one at least partially translucent light exit window (311). 21. Device according to one of claims 2 to 19, characterized in that a cover film is arranged in the light exit direction after the lens (300), the cover film having opaque and at least partially translucent areas. 22. Motor vehicle headlight, comprising at least one lighting and / or signaling device according to one of claims 1 to 21. 17/26 ο 1S / «w— * 19/26 3.4 20/26 100 21/26