Panel assembly for a motor vehicle

Abstract

The invention relates to a pane assembly (1) for a motor vehicle (50), in particular a roof pane assembly (2), having a transparent base pane (3) and at least one light source (7) which generates light during operation and emits light in the direction of the inner side (4) of the base pane. Improved lighting is achieved by providing on the base pane inner side (4) at least one reflective portion (10) reflecting back light of at least one of the at least one light sources (7). The invention also relates to a motor vehicle (50) having such a pane assembly (1).

Description

Technical Field

[0001] The invention relates to a window pane assembly for a motor vehicle, in particular a roof window pane assembly. The invention also relates to a motor vehicle having such a window pane assembly. Background Art

[0002] Motor vehicles often have panes through which occupants of the motor vehicle can see to the outside. This includes, for example, windshields and side panes. Such panes may also be arranged in the roof of the motor vehicle in order to allow a view upwards and / or to allow light to penetrate from the outside into the motor vehicle.

[0003] In particular, the integration of the pane in the roof of a motor vehicle leads to restrictions in the lighting possibilities.

[0004] DE 10 2008 045 474 A1 discloses a motorized window pane having a first transparent layer and at least one luminous body arranged on the layer. In addition, a transparent conductor structure for supplying power to the luminous body is provided on the first layer.

[0005] DE 10 2004 007 555 A1 describes an interior lighting fixture for a vehicle with a glass roof. The fixture has a light pane and a light coupling element, which couples light from a light source laterally into the light pane. In order to allow light to enter only from one side of the light pane, the light pane has a shading device. Summary of the invention

[0006] The object of the invention is to provide an improvement or at least another embodiment of a window pane assembly for a motor vehicle and of a motor vehicle having such a window pane assembly, which in particular eliminates the disadvantages of the prior art. In particular, the invention relates to the object of specifying an embodiment for a window pane assembly and a motor vehicle, which is characterized by improved lighting.

[0007] According to the invention, this object is achieved by the subject matter of the independent claim. Advantageous embodiments are the subject matter of the dependent claims.

[0008] Therefore, the present invention is based on the general idea of ​​providing a pane for a motor vehicle as a component, wherein a light source emits light in the direction of a base pane, wherein a local reflection is provided on the side of the base pane facing away from the light source, which reflects the light of the light source back so that the light leaves the base pane outside the reflection and is therefore output. This results in that the light source in the component (hereinafter also referred to as the pane component) can be arranged as required, in particular closer to a predetermined light output point, so that the pane component can output light with increased light intensity over the entire pane component. In addition, the reflection locally prevents the output of light, thereby enabling a separate output of light, in particular a separate output of light patterns. In addition, the reflection can be used to locally reduce the intensity of the output light, so as to avoid, for example, areas with enhanced light output, so-called "hot spots", which are usually located directly below the light source, or at least reduce the light intensity in these areas. Therefore, in general, light with increased light intensity can be emitted over the entire pane component, while adapting the output of the light to individual needs. In particular, the light output in the head area and / or in the direction of the eyes of the occupants of the motor vehicle can be reduced. As a result, the pane component leads to a separate output of light while increasing comfort.

[0009] According to the idea of ​​the present invention, the pane assembly has a transparent pane as a base pane. The base pane has two sides facing away from each other, which are also referred to as the base pane inner side and the base pane outer side hereinafter. The pane assembly also includes a device having at least one light source, which is also referred to as a light source device hereinafter. The light source device and therefore at least one light source are arranged on the side of the base pane outer side facing away from the base pane inner side. The corresponding light source is configured to generate light during operation and emit light in the direction of the base pane inner side. In addition, the pane assembly has a reflecting device. The reflecting device is arranged on the base pane inner side and has at least one reflecting part and at least one transmitting part. The corresponding reflecting part is configured so that the reflecting part reflects the light from at least one of the at least one light source, preferably the light from the corresponding light source, back to the base pane outer side. The corresponding transmitting part is configured so that the transmitting part is transparent to at least one of the at least one light source, preferably the light of the corresponding light source, so that the light leaves the pane assembly through at least one transmitting part and is output.

[0010] Preferably, the reflecting means having at least one reflecting portion is reflective, thus reflecting back light of the at least one light source, and is otherwise transparent. As a result, light can pass through the reflecting means to outside the at least one reflecting portion, thereby being emitted.

[0011] In this case, "transparent" means that at least one of the at least one light source, preferably the respective light source, is transparent to light.

[0012] Preferably, the term "transparent" is understood to mean completely transparent to visible light. Thus, light generated by the at least one light source can be emitted via the inside of the base pane or the reflecting device, while light from the environment, in particular daylight, can pass through the pane assembly. In particular, this allows, in addition to light penetrating the pane assembly from the outside, also observation through the pane assembly.

[0013] The pane assembly is advantageously used in a motor vehicle.

[0014] In motor vehicles, the interior, in particular the passenger space, is preferably illuminated and / or illuminated individually by means of a light source arrangement.

[0015] The pane assembly advantageously confines the interior space of the motor vehicle.

[0016] The inside of the base pane or the reflective device advantageously faces the interior of the motor vehicle.

[0017] It is conceivable that the pane assembly is used as a side pane of a motor vehicle and / or a side pane of a motor vehicle or a part thereof.

[0018] The pane assembly is advantageously used in the roof of a motor vehicle, i.e. the pane assembly is a roof pane assembly. Thus, during operation of the light source device, the pane assembly generates light individually and purposefully for the occupants of the motor vehicle. At the same time, the occupants of the motor vehicle can look out through the roof pane assembly. Thus, the roof pane assembly is preferably used as a panoramic roof for a motor vehicle or is part of a panoramic roof. In this case, in particular individual lighting of the type of roof lining and / or ambient lighting can be realized with the aid of the roof pane assembly.

[0019] The light source arrangement of the pane assembly may have a single light source.

[0020] Advantageously, the light source device has at least two light sources. Advantageously, the light sources are spaced apart from one another. Advantageously, the light sources are evenly distributed in the pane assembly, in particular in the light source device. This allows for even, individual and targeted light output.

[0021] The respective light source may be of any desired configuration as long as it generates light in operation and emits it in a direction inside the base pane.

[0022] Advantageously, at least one of the at least one light source, preferably the respective light source, is a light emitting diode or LED for short. This allows a compact design of the pane assembly, increases the number of light sources and leads to a reduction in energy consumption.

[0023] If the light source arrangement has two or more light sources, at least two of the light sources may generate different types of light, for example light of different colors and / or light intensities.

[0024] Preferred embodiments, wherein the light sources generate the same type of light. Thus, a simple and cost-effective conversion of the pane assembly is achieved, while a separate output of the light and the avoidance of hot spots are achieved in a simple and cost-effective manner by the reflective means.

[0025] The respective reflective portion may be converted in any desired manner as long as it reflects back light from at least one of the at least one light source, preferably light from the respective light source.

[0026] At least one of the at least one reflecting portion, in particular the respective reflecting portion, is advantageously a reflecting layer.

[0027] At least one of the at least one reflecting portion, in particular the respective reflecting portion, may be applied directly to the inside of the base pane.

[0028] Embodiments are also conceivable in which the reflecting means comprises a film having at least one reflecting portion. Furthermore, the film is preferably transparent.

[0029] In an advantageous embodiment, the reflecting means has at least two reflecting parts and at least one transmissive region which separates the reflecting parts from one another along the inside of the base pane. Thus, a more individual output of the light generated by the at least one light source can be achieved.

[0030] An advantageous embodiment is one in which the pane assembly has parts that scatter the light reflected back from at least one reflecting part, which parts are also referred to as scattering parts hereinafter. Therefore, the following embodiment is preferred, in which a scattering structure having at least one scattering part is arranged on a side of the outside of the base pane away from the inside of the base pane. The corresponding scattering part is designed so that the scattering part scatters the light reflected back from the reflecting device in the direction of the inside of the base pane. Therefore, the scattered light is emitted from the pane assembly via at least one transmission part as scattered light or diffuse light. This leads to further personalization of the light output. In addition, in this way, it is possible to define areas through which light generated by at least one light source directly passes and other areas through which light generated by at least one light source is emitted as scattered light or diffuse light.

[0031] The pane assembly advantageously has a cover pane, wherein the light source device is arranged between the cover pane and the base pane. This means that the pane assembly has a cover pane on the side of the light source device facing away from the outside of the base pane.

[0032] The light source device is advantageously attached to the cover pane. This results in a simple manufacture and a compact design of the pane assembly.

[0033] In a preferred embodiment, the light source device has a functionalized film, also referred to below as a functional film. The functional film has good electrical insulation and is preferably made of plastic. The functional film is advantageously produced by injection molding. In this case, at least one of the at least one light source, preferably the corresponding light source, is attached to the functional film. Such a functional film can be attached between and on the panes and / or processed in a simple manner. This simplifies the manufacture of the pane assembly, which is moreover more compact.

[0034] The at least one light source can be attached to the functional film in any desired manner. In particular, the at least one light source is connected to the functional film, for example by bonding.

[0035] Preferably, the functional film is attached to the cover pane, in particular glued to the side of the cover pane facing the base pane. This leads to a simplified production of the pane assembly.

[0036] Advantageously, the functional film has at least one electrical conductor track for supplying power to the at least one light source. In a preferred embodiment, the functional film is printed with at least one conductor track. This results in a compact design and inexpensive manufacture of the pane assembly.

[0037] The use of such functional films is known, for example, from so-called "intelligent glasses" or "smart glasses", in particular in "polymer dispersed liquid crystal devices" or "PDLC" for short, and from "suspended particle devices" or "SPD" for short. Thus, the pane assembly can be produced in a simple, inexpensive and precise manner.

[0038] In an advantageous embodiment, at least one of the at least one scattering portion, in particular the scattering structure, is attached to the functional film. This leads to a further simplification of the manufacture of the pane assembly and at the same time to a precise arrangement of the at least one scattering portion and thus to a more precise light output.

[0039] In a preferred embodiment, in the light cone inside the base window pane, at least one of the at least one light source, preferably the corresponding light source, has such a reflective portion and no reflective portion outside the light cone. Thus, the region of the reflective device without reflective portions is arranged outside the light cone, which region is also referred to as the transmission region hereinafter. Thus, the hot spots are avoided in a simple and effective manner, while achieving a targeted and / or large-area output of light.

[0040] The scattering structure advantageously has no scattering portion in the region of at least one of the at least one light source and has a scattering portion spaced apart from the light source. Thus, the scattering structure has at least one region without scattering portions, which region is also referred to as a free region hereinafter. The respective light source is conveniently arranged in the associated free region.

[0041] A preferred embodiment is one in which the transmission area of ​​the reflective device without the reflecting part and the free area of ​​the scattering structure without the scattering part are spaced apart from each other transversely to the distance direction inside the base window pane and outside the base window pane. Preferably, at least one of the at least one transmission area overlaps with the scattering part transversely to the distance direction. As a result, direct emission of light from at least one of the at least one light source is prevented or at least reduced, thereby avoiding or at least reducing hot spots. At the same time, a large area and diffuse output of light is achieved outside the hot spots.

[0042] It should be understood that in addition to the window pane assembly, a motor vehicle having such a window pane assembly also falls within the scope of the present invention.

[0043] Further important features and advantages of the invention emerge from the dependent claims, the drawings and the description of the associated figures based on the drawings.

[0044] It is to be understood that the features mentioned above and those yet to be explained below can be used not only in the respectively specified combination but also in other combinations or alone, without departing from the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Preferred embodiments of the invention are shown in the drawings and are explained in more detail in the following description, wherein the same reference numerals refer to identical or similar or functionally identical components.

[0046] Here,

[0047] Figure 1 shows a highly simplified cross section through a motor vehicle having a pane assembly;

[0048] Figure 2 A cross section through a pane assembly is shown;

[0049] Figure 3 A top view of the reflective device of the pane assembly is shown. DETAILED DESCRIPTION

[0050] like Figures 1 to 3 The pane component 1 shown is used to Figure 1 In the motor vehicle 50 shown. In the embodiment shown, the pane assembly 1 is used on the roof 52 of the motor vehicle 50 and is therefore a roof window assembly 2 as part of a panoramic roof 53 of the motor vehicle 50 or forming a panoramic roof 53. In this case, the pane assembly 1 defines an interior space 51 of the motor vehicle 50 for an occupant (not shown). Thus, the pane assembly 1 designed as a roof window assembly 2 delimits the interior space 51 in the Z direction 100 of the motor vehicle 50.

[0051] from Figure 2As can be seen from the cross section through the pane assembly 1 shown, the pane assembly 1 has a transparent pane 3, which is also referred to as the base pane 3 below. The base pane 3 has two side surfaces 4 and 5 facing away from each other, which are also referred to as the base pane inner side 4 and the base pane outer side 5 below. The base pane inner side 4 and the base pane outer side 5 are spaced apart from each other in a direction 101 (hereinafter also referred to as the distance direction 101). In the embodiment shown, the distance direction 101 extends substantially parallel to the Z direction 100. The pane assembly 1 also has a device 6 including at least one light source 7, which is also referred to as the light source device 6 below. In the embodiment shown, the light source device 6 has at least two light sources 7, Figure 2 In the sectional view of FIG. , two such light sources 7 can be seen. In the embodiment shown, the respective light sources 7 are designed as LEDs 8. The light source arrangement 6 and therefore at least one light source 7 are arranged on the side of the base pane outer side 5 facing away from the base pane inner side 4. The respective light sources 7 are designed in such a way, in particular aligned in such a way, that they generate light during operation and emit light in the direction of the base pane inner side 4. Figure 2 In the illustration of , the light generated and emitted by the left light source 7 and its path or propagation are indicated by arrows as an example. The pane assembly 1 also has a device 9, which is also referred to as reflecting device 9 in the following text. The reflecting device 9 is arranged on the inner side 4 of the base pane. The reflecting device 9 has at least one portion 10, which reflects the light of at least one light source device 6, in the embodiment shown, and preferably reflects the light of the corresponding light source device 6, which portion 10 is also referred to as reflecting portion 10 in the following text. The corresponding reflecting portion 10 is designed so that the reflecting portion 10 reflects the light from the light source 7 back to the outer side 5 of the base pane, as shown in FIG. Figure 2 The reflecting device 9 also has at least one portion 11 which is transparent to the light of at least one of the light source devices 6, preferably transparent to the entire visible light in this case, and which portion 11 is also referred to as the transmissive portion 11 hereinafter. Therefore, the corresponding transmissive portion 11 is designed so that the transmissive portion 11 is transparent to the light from the light source 7, so that the light leaves the pane assembly 1 through the transmissive portion 11 and is thus emitted. Therefore, with a compact design, light with any desired pattern and / or with increased light intensity can be emitted from the pane assembly 1 through the inner side 4 of the base pane.

[0052] Figure 3 FIG. 1 shows a top view of the reflecting device 9. Figure 3 It can be seen that in the embodiment shown, the reflecting means 9 has a plurality of reflecting portions 10 spaced apart from one another and a continuous transmissive portion 11 separating the reflecting portions 10 from one another along the inner side 4 of the base pane. Figure 3It can also be seen that in the embodiment shown, the reflecting means 9 have differently sized reflecting portions 10. The respective reflecting portions 10 can be formed by a respective reflecting coating of the inner side 4 of the base pane or a film arranged on the inner side 4 of the base pane (not shown in each case).

[0053] like Figure 1 As shown, in the embodiment shown, the pane assembly 1 with the base pane inner side 4 or the reflector device 9 delimits an interior space 51 of a motor vehicle 50. Thus, for example, a roof lining can be integrated into a panoramic roof 53 using the pane assembly 1.

[0054] In the embodiment shown, the light source device 6 is arranged between the base pane 3 and the cover pane 18 of the pane assembly 1. The pane assembly 1 thus has a cover pane 18 on the side of the light source device 6 facing away from the outer side 5 of the base pane.

[0055] In the illustrated embodiment, Figure 2 As shown, the light source device 6 has a plastic functional film 14, to which the light source 7 is attached. In this case, the functional film 14 and therefore the light source device 6 are attached to a cover pane 18. The light source 7, in particular the LED 8, can be glued to the functional film 14. In addition, conductor tracks (not shown) for supplying power to the light source 7 can be printed on the functional film 14.

[0056] In the embodiment shown, Figure 2 As shown, the pane assembly 1 has a structure 12, which scatters the light reflected from the reflective device 9 in the direction of the inner side 4 of the base pane through the portion 13, so that the scattered light or diffuse light is emitted via the at least one transmission portion 11. The structure 12 is also referred to as the scattering structure 12 below, and the portion 13 is referred to as the scattering portion 13. The respective scattering portion 13 is designed so that the scattering portion 13 scatters the light reflected from the reflective device 9 in the direction of the inner side 4 of the base pane, as shown in FIG. Figure 2 In the embodiment shown, the scattering structure 12 is attached to the functional film 14 .

[0057] like Figure 2As shown, in the embodiment shown, the reflecting device 9 has at least one area 16, which is free of reflecting parts 10 and is therefore transparent to the light from the light source 7. This area 16 is also referred to as the transmission area 16 below. Therefore, in the transmission area 16, light can enter from the pane assembly 1 via the inner side 4 of the base pane. In the embodiment shown, the reflecting device 9 has such a reflecting part 10 on the inner side of the base pane in the light cone 15 of the corresponding light source device 6, and has no reflecting part 10 outside the light cone 15. Therefore, the area outside the light cone 15 is the transmission area 16. Therefore, the light generated by the corresponding light source 7 cannot be completely directly emitted from the pane assembly 1, so that the so-called "hot spots" of light are avoided.

[0058] from Figure 2 It can also be seen that in the embodiment shown, the scattering portions 13 are arranged in groups, so that the scattering structure 12 has areas 17 in which no scattering portions 13 are present, which are also referred to as free areas 17 hereinafter. Therefore, light is not scattered in the free areas 17. In each case, the light source 7 is arranged in such a free area 17 that the scattering structure 12 is arranged in an area of ​​the light source device 6 in which no scattering portions 13 are present. Furthermore, in the embodiment shown, the transmission areas 16 of the reflecting device 9 and the free areas 17 of the scattering structure 12 are spaced apart from each other transversely to the distance direction 101 from the inner side 4 of the base pane to the outer side 5 of the base pane, so that at least one transmission area 16 overlaps with the grouped scattering portions 13. Therefore, as Figure 2 As shown by the middle arrow, the light reflected from the reflecting portion 10 of the reflecting device 9 is scattered by the scattering portion 13 in the direction of the transmitting region 16 .

Claims

1. A pane assembly (1) for a motor vehicle (50), in particular a roof pane assembly (2), - having a transparent base pane (3) having a base pane inner side (4) and a base pane outer side (5) facing away from the base pane inner side (4), - having a light source device (6), which is arranged on the side of the outer side (5) of the base pane facing away from the inner side (4) of the base pane and has at least one light source (7), in particular at least one LED (8), -in, The respective light source (7) is configured to generate light during operation and to emit the light in the direction of the inner side (4) of the base pane, - having reflecting means (9) arranged on the inner side (4) of said base pane, -in, The reflecting device (9) has at least one reflecting part (10) and at least one transmitting part (11), - wherein the respective reflective portion (10) is configured such that the reflective portion (10) reflects light of at least one of the at least one light source (7) back to the outside (5) of the base pane, - wherein the respective transmissive portion (11) is configured such that the transmissive portion (11) is transparent for light of at least one of the at least one light source (7), such that the light leaves the pane assembly (1).

2. The pane assembly according to claim 1, It is characterized in that The reflecting device (9) has at least two reflecting parts (10) and at least one transmitting part (11) separating the reflecting parts (10) from each other along the inner side (4) of the base pane.

3. The pane assembly according to claim 1 or 2, It is characterized in that A scattering structure (12) having at least one scattering portion (13) is arranged on a side of the outer side (5) of the base window pane facing away from the inner side (4) of the base window pane, wherein the corresponding scattering portion (13) is configured so that the scattering portion (13) scatters light reflected back from the reflecting device (9) in the direction of the inner side (4) of the base window pane.

4. The pane assembly according to any one of claims 1 to 3, It is characterized in that The light source device (6) comprises a functional film (14), to which the at least one light source (7) is attached.

5. The pane assembly according to claims 3 and 4, It is characterized in that The scattering structure (12) is attached to the functional film (14).

6. The pane assembly according to any one of claims 1 to 5, It is characterized in that The reflecting device (9) has a reflecting portion (10) inside the base pane which is in the light cone (15) of at least one of the at least one light source device (6), and the reflecting device (9) has no reflecting portion (10) outside the light cone (15).

7. The pane assembly according to any one of claims 3 to 6, It is characterized in that The scattering structure (12) is free of scattering portions (13) in the region of at least one of the at least one light source device (6), and the scattering structure (12) comprises scattering portions (13) spaced apart from the light source device (6).

8. The pane assembly according to claims 6 and 7, It is characterized in that The transmission area (16) of the reflecting device (9) without the reflecting part (10) and the free area (17) of the scattering structure (12) without the scattering part (13) are spaced apart from each other transversely to the distance direction (101) from the inner side (4) of the base window pane to the outer side (5) of the base window pane.

9. The pane assembly according to any one of claims 1 to 8, It is characterized in that The pane assembly (1) has a cover pane (18) on the side of the light source device (6) facing away from the outer side (5) of the base pane, and the light source device (6), in particular the functional film (14), is attached to the cover pane (18).

10. A motor vehicle (50) comprising a pane assembly (1) according to any one of claims 1 to 9, wherein: The pane assembly (1) defines an interior space (51) of the motor vehicle (50).

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