Image display system for motor vehicle and motor vehicle having image display system

Abstract

The invention relates to an image display system for a motor vehicle, comprising a projector (18) and a pane assembly (16), which comprises a reflective layer (24) for reflecting a light beam of the projector (18) and an absorbing layer (26) for absorbing the light beam of the projector (18), characterized in that the reflective layer (24) and the absorbing layer (26) are arranged in the reflective layer (24), and the absorbing layer (26) is arranged between the reflective layer (24) and the absorbing layer (26). The absorbent layer (26) has a plurality of light absorbing sheets (50) spaced apart from each other, at least two of the light absorbing sheets (50) having different distances from one of the respective adjacent light absorbing sheets (50), and / or at least two of the light absorbing sheets (50) having different shapes from each other. The invention further relates to a motor vehicle having such an image display system (12).

Description

Technical Field

[0001] This invention relates to an image display system for a motor vehicle, comprising a projector and a window panel assembly. Furthermore, this invention relates to a motor vehicle having such an image display system. Background Technology

[0002] Image display systems for motor vehicles are known from the prior art in various embodiments.

[0003] Known image display systems typically include a projector and a projection element on which an image projected by the projector can be displayed. The projection element has a reflective or diffuse scattering layer and an absorption layer disposed behind the reflective layer. This absorption layer absorbs the light beam from the projector that passes through the projection layer, thereby preventing unwanted light from passing through the projection element. Known absorption layers are completely opaque.

[0004] Therefore, known image display systems cannot be placed in areas of a motor vehicle where visibility should be ensured for the vehicle occupants. Summary of the Invention

[0005] The objective of this invention is to provide an image display system for a motor vehicle capable of imaging or displaying images projected by a projector on a projection element. Simultaneously, it should eliminate or at least significantly reduce the undesirable passage of light beams through the projection element, and at least when viewed from a defined viewing angle, the projection element should provide vehicle occupants with a view of the projection element. Furthermore, the objective of this invention is to provide a motor vehicle having such an image display system.

[0006] This task is solved according to the present invention by an image display system having the features of claim 1 and a motor vehicle having the features of claim 15.

[0007] Therefore, according to the present invention, an image display system for a motor vehicle is provided, comprising a projector and a window panel assembly. The window panel assembly has a reflective layer for reflecting a light beam from the projector, the reflective layer forming a projection element, and an absorptive layer for absorbing the light beam from the projector. The absorptive layer has a plurality of light-absorbing sheets, which are spaced apart from corresponding adjacent light-absorbing sheets / each adjacent light-absorbing sheets by a spacing. At least two of the spacings between adjacent light-absorbing sheets are different from each other, and / or at least two of the light-absorbing sheets have different shapes from each other, especially different cross-sectional profiles.

[0008] Therefore, the core idea of ​​this invention is to provide a reflective layer and an absorptive layer. The reflective layer reflects the light beam from the projector, allowing the projected image to be displayed, while the light-absorbing sheets exclude or at least reduce the unwanted passage of the light beam through the window panel assembly. Because the light-absorbing sheets are spaced apart, the absorptive layer remains at least partially transparent or transparent when the window panel assembly is viewed from a defined viewing angle. By making at least two of the spacings between adjacent light-absorbing sheets different from each other and / or by making at least two of the light-absorbing sheets have different shapes from each other, the absorptive layer can be adjusted such that, with defined absorption, maximum transparency of the window panel assembly can be achieved.

[0009] For example, all the light-absorbing sheets are spaced at different distances from each other and / or all the light-absorbing sheets have different shapes.

[0010] The window panel assembly may include a first window panel and / or a second window panel.

[0011] The first window panel can face the interior space of the vehicle, thus forming the inner window panel.

[0012] For example, the second window panel faces the surrounding environment of the vehicle, thus forming the outer window panel.

[0013] For example, a reflective layer and an absorptive layer are arranged between the first window panel and the second window panel, such that the reflective layer and the absorptive layer form an intermediate layer.

[0014] The reflective layer can be a scattering layer, which diffusely scatters the light beams incident upon it, making it possible to display the projected image.

[0015] In an exemplary embodiment of the image display system according to the present invention, the spacing and / or shape of the light-absorbing sheets are directly or indirectly proportional to the distance between the light-absorbing sheets and the projector, and / or directly or indirectly proportional to the angle of incidence of the light beam from the projector onto the light-absorbing sheets.

[0016] In a preferred embodiment of the image display system according to the invention, a light-absorbing sheet can be used to absorb the light beam from the projector that passes through the reflective layer and extends particularly toward the environment surrounding the vehicle.

[0017] In an exemplary embodiment of the image display system according to the invention, the light beam from the projector can be reflected by means of a reflective layer, enabling the display of the projected image. Therefore, the reflective layer is used to couple the image projected by the projector out, and thus forms a projection element.

[0018] In a preferred embodiment of the image display system according to the present invention, the greater the distance between the light-absorbing sheet and the adjacent light-absorbing sheet, that is, the greater the spacing between the adjacent light-absorbing sheets, the greater the distance between the light-absorbing sheet and the projector.

[0019] The spacing between adjacent light-absorbing sheets can be directly proportional to the distance between the light-absorbing sheet and the projector.

[0020] In an exemplary embodiment of the image display system according to the present invention, the greater the distance between the light-absorbing sheet and the adjacent light-absorbing sheet, the smaller the incident angle of the light beam from the projector illuminating the light-absorbing sheet.

[0021] The spacing between adjacent light-absorbing sheets can be indirectly proportional to the incident angle of the light beam from the projector that illuminates the light-absorbing sheets.

[0022] The angle of incidence is the angle formed by the incident light beam and the incident perpendicular line.

[0023] An incident perpendicular line is a line perpendicular or orthogonal to the surface illuminated by a light beam, especially at the point where the incident light beam hits the surface or at the point where the reflected light beam leaves the surface.

[0024] The light-absorbing plate extends vertically, for example. Therefore, the incident vertical line extends horizontally, for example.

[0025] In a preferred embodiment of the image display system according to the present invention, the smaller the extension dimension of the light-absorbing sheet in the height direction of the window panel assembly, i.e., the smaller the height of the light-absorbing sheet, the farther the distance between the light-absorbing sheet and the projector.

[0026] In a preferred embodiment of the image display system according to the present invention, the smaller the extension dimension of the light-absorbing sheet in the height direction of the window panel assembly, the smaller the incident angle of the light beam from the projector illuminating the light-absorbing sheet.

[0027] In a preferred embodiment of the image display system according to the present invention, the light-absorbing sheet extends in the height direction of the window panel assembly by a dimension between 0.3 mm and 0.5 mm.

[0028] The light-absorbing sheet can extend vertically, that is, in the height direction of the window panel assembly, or it can be inclined, especially inclined from the vertical direction toward the projector, that is, inclined about an axis extending in the horizontal direction.

[0029] For example, the absorption layer extends in the lateral and / or longitudinal directions, such that a limited amount of light beam from at most the projector (especially on the side of the absorption layer) passes through the window panel assembly, especially without being absorbed by the absorption layer, i.e., without obstruction.

[0030] Therefore, the extent of the absorption layer in the lateral and / or longitudinal directions depends, for example, on the transmittance of the window panel assembly to the light beam from the projector and / or the position of the projector relative to the window panel assembly, especially the maximum angle of incidence of the light beam from the projector onto the window panel assembly.

[0031] In a preferred embodiment of the image display system according to the invention, the projector is arranged on the side of the reflective layer opposite to the absorber layer. Therefore, the light beam from the projector first illuminates the reflective layer, and then the portion of the light beam that passes through the reflective layer (i.e., not reflected by the reflective layer, especially not reflected in the direction toward the interior space of the vehicle) is absorbed by the absorber layer.

[0032] For example, the projector and the window panel assembly are arranged separately.

[0033] The projector can be placed on the lower side of the first window panel.

[0034] When the image display system is functionally installed in a motor vehicle, the first window panel faces, for example, the interior space of the motor vehicle. Therefore, the first window panel forms, for example, an inner window panel.

[0035] In a preferred embodiment of the image display system according to the invention, when the window panel assembly is viewed at a defined viewing angle, particularly -45° to +45°, the window panel assembly, particularly the absorbing layer, is at least partially transparent, and particularly completely transparent. Therefore, transparency of the window panel assembly is achieved.

[0036] The line of sight is the angle formed by the beam of light entering the eye of the observer, especially the vehicle occupant, from the window panel assembly and the perpendicular line of the window panel assembly. The perpendicular line of the window panel assembly is orthogonal to the window panel assembly, especially the lateral extension of the window panel assembly, and in particular intersects the point where the beam of light entering the observer's eye from the window panel assembly leaves the window panel assembly.

[0037] For example, when viewed from a viewing angle exceeding the defined viewing angle, especially from a viewing angle less than -45° and / or greater than +45°, the window panel assembly, especially the absorption layer, is not transparent or opaque.

[0038] In an exemplary embodiment of the image display system according to the present invention, the light-absorbing sheet extends in the height direction and the lateral direction of the window panel assembly, and / or extends in the height direction and the longitudinal direction of the window panel assembly.

[0039] The sheet may have a V-shaped profile or extend in a straight line in a top view of the window panel assembly.

[0040] For example, the opening side of the V-shaped profile faces the projector.

[0041] For example, the sheet has a rectangular or trapezoidal cross-sectional profile, particularly in sections of the window panel assembly in the height and lateral directions, or in sections of the window panel assembly in the height and longitudinal directions.

[0042] In a preferred embodiment of the image display system according to the invention, the absorption layer includes transparent regions, which in particular connect adjacent light-absorbing sheets to each other.

[0043] Transparent areas can be made of materials such as plastic.

[0044] In an exemplary embodiment of the image display system according to the present invention, the first window panel is connected to the reflective layer via a first connecting layer, the reflective layer is connected to the absorbent layer via a second connecting layer, and / or the absorbent layer is connected to the second window panel via a third connecting layer.

[0045] In a preferred embodiment of the image display system according to the present invention, the first connecting layer, the second connecting layer and / or the third connecting layer are formed of plastic and / or hot melt adhesive.

[0046] For example, the first connecting layer, the second connecting layer, and / or the third connecting layer are made of polyvinyl butyral (PVB) or thermoplastic polyurethane (TPU).

[0047] Window panel assemblies can be composite window panels.

[0048] For example, the first window panel and / or the second window panel may consist of glass or plastic.

[0049] The plastic can be or includes polycarbonate (PC) and / or polymethyl methacrylate (PMMA).

[0050] In one exemplary embodiment of the image display system according to the present invention, the window panel assembly is a roof window panel of a motor vehicle, especially a panoramic roof window panel, or a portion thereof forming a roof window panel.

[0051] The window panel assembly can be the front window panel of a motor vehicle, or a portion of the front window panel.

[0052] For example, a window panel assembly is a side window panel of a motor vehicle, or a portion of a side window panel.

[0053] In a preferred embodiment of the image display system according to the invention, the projector is arranged relative to the window panel assembly such that the incident angle of the light beam illuminating the light absorber is less than 90°, preferably less than 45°, and more preferably less than 35°.

[0054] For example, the reflective layer is a foil, a printed portion, or a coating.

[0055] The reflective layer can be arranged on the same side of the first window panel as the absorbent layer, or on the opposite side of the first window panel, especially on the side facing the interior space of the motor vehicle.

[0056] For example, the absorbent layer is an extrusion or a printed section.

[0057] The absorbent layer can be manufactured by a rolling process.

[0058] The reflective layer and / or absorbent layer may be laminated foil.

[0059] A window panel assembly may include at least one functional layer.

[0060] For example, a functional layer can be a switchable layer or a light guide layer.

[0061] The functional layer can form an additional layer to the window panel assembly, or be integrated into one of the aforementioned layers of the window panel assembly, particularly the first or second window panel.

[0062] For example, the first window panel and / or the second window panel are light guide layers, on which optical coupling output structures or optical coupling output patterns are arranged.

[0063] Optical coupling output structure or optical coupling output pattern, such as optical coupling output printing section.

[0064] Furthermore, the present invention provides a motor vehicle having the aforementioned image display system. Attached Figure Description

[0065] The present invention will be described in detail below based on embodiments shown in the accompanying drawings. The drawings show:

[0066] Figure 1 A top view showing a portion of a motor vehicle, including a composite window panel assembly according to the invention;

[0067] Figure 2 The window panel assembly shown in the invention is along the edge of the composite window panel assembly. Figure 1 Sectional view of line II-II in the middle;

[0068] Figure 3 Showing with Figure 2 The corresponding view, together with a schematic diagram of the projector and light beam of the composite window panel assembly according to the present invention;

[0069] Figure 4 A cross-sectional view of the reflective layer of the window panel assembly is shown, along with a schematic diagram of the viewing angle; and

[0070] Figure 5 A cross-sectional view of the absorption layer of the window panel assembly is shown, along with a schematic diagram of the incident angle. Detailed Implementation

[0071] exist Figure 1The diagram shows a motor vehicle roof 10 according to the present invention. The motor vehicle roof 10 includes an image display system 12 having a window panel assembly 16 and a projector 18. The window panel assembly 16 forms the roof window panel of the motor vehicle, especially a panoramic roof window panel, and is rigidly or immovably attached to the roof frame 14 fixed to the vehicle body of the motor vehicle roof 10.

[0072] and Figure 1 Although the implementation shown is different, it can also be envisioned that the window panel assembly 16 is the front window panel or a portion of the front window panel of a motor vehicle.

[0073] Figure 2 A cross-sectional view of a window panel assembly 16 of an image display system 12 according to the present invention is shown. The window panel assembly 16 is a composite window panel. However, in Figure 2 and Figure 3 In the middle, the window panel assembly 16 is shown in an unassembled state.

[0074] As from Figure 2 As can be seen in the cross-sectional view, the window panel assembly 16 includes, in the following order, a first window panel 20 forming an inner window panel and facing the interior space of the vehicle, a first connecting layer 28, a reflective layer 24, a second connecting layer 30, an absorbing layer 26, a third connecting layer 32, and a second window panel 22 forming an outer window panel and facing the exterior space of the vehicle or the environment surrounding the vehicle.

[0075] The first connecting layer 28, the second connecting layer 30, and the third connecting layer 32 are all plastic adhesive layers.

[0076] The reflective layer 24 is formed of a material that reflects light. This is particularly evident in the image display system 12 according to the invention. Figure 3 As can be seen in the cross-sectional view shown, the reflective layer 24 can thus reflect the light beam 36 of the projector 18, so that the image to be projected is imaged, especially in the form of a reflected light beam 38 that enters the eyes of the vehicle occupant.

[0077] The absorbing layer 26 includes a transparent region 44 and a light-absorbing sheet 50. The light-absorbing sheet 50 extends in the height and longitudinal directions of the window panel assembly 16 and is interconnected through the transparent region 44, which is in particular formed of transparent plastic.

[0078] Unlike the embodiment shown, it is also conceivable to arrange the light-absorbing sheet 50 to extend in both the height and lateral directions of the window panel assembly 16.

[0079] A portion of the light beam 36 from the projector 18 passes through the reflective layer 24. That is, a portion of the light beam 36 from the projector 18 is not reflected by the reflective layer 24 toward the interior space of the vehicle, but passes through the reflective layer 24.

[0080] The light beam 40 passing through the reflective layer 24 at an incident angle α1, α i The light is irradiated onto the light-absorbing plate 50. For example, from... Figure 5 It can be seen that the incident angles α1 and α i The angle is described by the incident light beam passing through the reflective layer 24 and the incident perpendicular line 42. The incident perpendicular line 42 refers to a perpendicular or orthogonal line perpendicular to the surface illuminated by the light beam 40, especially the perpendicular or orthogonal line at the point where the incident light beam illuminates the surface or the point where the reflected light beam leaves the surface, which in this case is the surface of the corresponding light absorber in the light absorber 50 facing the projector.

[0081] For example, especially from Figure 5 It is evident that the greater the distance between the light-absorbing sheet 50 and the projector 18, the greater the incident angle α1, α2 of the light beam 40 onto the light-absorbing sheet 50. i The smaller the distance, the greater the distance between the light-absorbing sheet and the projector 18, and the greater the increase in the spacing d1, d3, d4 between adjacent light-absorbing sheets 50. n And it is still able to ensure sufficient absorption of the light beam 40.

[0082] Therefore, unlike the configuration of the absorption layer 26 shown in the figure, even if the light-absorbing sheet 50, which is farther from the projector, has a smaller height h (i.e., its extension dimension in the direction orthogonal to the lateral extension plane of the window panel assembly 12), sufficient absorption of the light beam 40 by the light-absorbing sheet 50 can still be achieved. In particular, the height h of the light-absorbing sheet 50 can decrease as the distance from the projector 18 increases, and especially decreases continuously.

[0083] Since the light-absorbing sheets 50 are spaced apart from each other, i.e., transparent areas 44 are provided between the light-absorbing sheets 50, the absorption layer 26 is either transparent or allows the viewer to pass through when observing the window panel assembly 16 at a limited viewing angle β, especially when observing at a limited viewing angle β between -45° and +45°.

[0084] The defined viewing angle β represents the angle formed by the viewing direction 46 of the observer looking towards the window panel assembly 12, or by the light beam entering the observer's eye 34 from the window panel assembly 12, and the perpendicular line 48 of the window panel assembly 12. The perpendicular line 48 is an orthogonal line of the window panel assembly 12, which extends in particular perpendicular to the lateral extension plane of the window panel assembly 12.

[0085] like Figure 5 As shown, when the spacing d1, d3, d50 between the light-absorbing plates 50 n As the distance between the light-absorbing sheet 50 and the projector 18 increases, the viewing angle β that the line of sight of the absorption layer 26 can pass through also increases.

[0086] When the viewing angle exceeds the limit β, the absorption layer 26 is not transparent. When viewing the window panel assembly 16 at a viewing angle β greater than the limit β, the absorption layer 26 is opaque or not transparent due to the light-absorbing sheet 50.

[0087] List of reference numerals

[0088] 10. Motor vehicle roof

[0089] 12 Image Display System

[0090] 14. Roof frame

[0091] 16 Window panel assembly

[0092] 18 Projectors

[0093] 20 First Window Board

[0094] 22 Second window panel

[0095] 24. Reflective layer

[0096] 26 Absorption Layer

[0097] 28 First Connector Layer

[0098] 30 Second Connecting Layer

[0099] 32 Third Connector Layer

[0100] 34 Eyes

[0101] 36. Light beam from the projector

[0102] 38 Reflected light beam

[0103] 40 Projector light beams passing through the reflective layer

[0104] 42. Perpendicular to the incident line

[0105] 44 Transparent Area

[0106] 46. ​​Direction of gaze

[0107] 48 perpendicular lines

[0108] 50 light-absorbing sheet

[0109] d1 Spacing between adjacent light-absorbing plates

[0110] d3 Spacing between adjacent light-absorbing plates

[0111] d n Spacing between adjacent light-absorbing sheets

[0112] The height of the light-absorbing plate

[0113] α1 Angle of incidence

[0114] α i Angle of incidence

[0115] β line of sight angle.

Claims

1. An image display system for a motor vehicle, the image display system comprising a projector (18) and a window panel assembly (16), the window panel assembly comprising a reflective layer (24) for reflecting a light beam from the projector (18) and an absorptive layer (26) for absorbing a light beam from the projector (18), characterized in that, The absorption layer (26) has a plurality of light-absorbing sheets (50) spaced apart from each other, wherein at least two of the light-absorbing sheets (50) are at different distances from their respective adjacent light-absorbing sheets (50), and / or at least two of the light-absorbing sheets (50) have different shapes from each other.

2. The image display system according to claim 1, characterized in that, The spacing of the light-absorbing plates (d1, d3, d) n The shape is directly or indirectly proportional to the distance between the light-absorbing sheet and the projector (18), and / or directly or indirectly proportional to the angle of incidence of the light beam from the projector (18) onto the light-absorbing sheet (50).

3. The image display system according to claim 1 or 2, characterized in that, The light-absorbing sheet (50) can absorb the light beam (40) of the projector (18) that passes through the reflective layer (24).

4. The image display system according to any one of claims 1 to 3, characterized in that, The light beam (36) of the projector (18) can be reflected by the reflective layer (24), so that the projected image can be displayed.

5. The image display system according to any one of claims 1 to 4, characterized in that, The greater the distance between the light-absorbing sheet (50) and its adjacent light-absorbing sheet (50), the greater the distance between the light-absorbing sheet (50) and the projector (18), and / or the greater the angle of incidence (α1, α2) of the light beam (40) from the projector (18) onto the light-absorbing sheet (50). i The smaller the value.

6. The image display system according to any one of claims 1 to 5, characterized in that, The smaller the extension dimension (h) of the light-absorbing sheet (50) in the height direction of the window panel assembly (16), the greater the distance between the light-absorbing sheet (50) and the projector (18), and / or the greater the angle of incidence (α1, α2) of the light beam (40) of the projector (18) onto the light-absorbing sheet (50). i The smaller the value.

7. The image display system according to any one of claims 1 to 6, characterized in that, The light-absorbing sheet (50) extends in the height direction of the window panel assembly (16) by an amount (h) ranging from 0.3 mm to 0.5 mm.

8. The image display system according to any one of claims 1 to 7, characterized in that, The projector (18) is arranged on the side of the reflective layer (24) opposite to the absorber layer (26).

9. The image display system according to any one of claims 1 to 8, characterized in that, The window panel assembly (16) is transparent when viewed at a defined viewing angle (β), and is opaque in other cases, particularly in the viewing angle range of -45° to +45°.

10. The image display system according to any one of claims 1 to 9, characterized in that, The light-absorbing sheet (50) extends in the height direction and the lateral direction of the window panel assembly (16), and / or in the height direction and the longitudinal direction of the window panel assembly (16).

11. The image display system according to any one of claims 1 to 10, characterized in that, The absorption layer (26) includes a transparent region (44) that connects the light-absorbing sheets (50) to each other.

12. The image display system according to any one of claims 1 to 11, characterized in that, A first window panel (20) is provided, which is connected to the reflective layer (24) through a first connecting layer (28), and / or the reflective layer (24) is connected to the absorbent layer (26) through a second connecting layer (30), and / or the absorbent layer (26) is connected to the second window panel (22) through a third connecting layer (32).

13. The image display system according to any one of claims 1 to 12, characterized in that, The window panel assembly (16) is a roof window panel of a motor vehicle, a front window panel of a motor vehicle, or a side window panel of a motor vehicle, especially a panoramic roof window panel.

14. The image display system according to any one of claims 1 to 13, characterized in that, The projector (18) is arranged relative to the window panel assembly (16) such that the incident angle (α1, α2) when the light beam illuminates the light absorber (50) is such that the incident angle (α1, α2) is such that the incident angle (α1, α3) is such that the incident angle (α1, α4) is such that the incident angle (α1, α5) when the light beam illuminates the light absorber (50) is such that the incident angle (α1, i The angle is less than 90°, preferably less than 45°, and even more preferably less than 35°.

15. A motor vehicle, characterized in that, The image display system (12) has any one of claims 1 to 14.

Images