Display device for vehicle

By using side-by-side light conductors and light sources of different wavelengths in the vehicle internal display device, light is directly reflected to the hologram, which solves the problem of compact structure and personalized display in a narrow space, and improves safety and display effect.

CN119156302APending Publication Date: 2024-12-17HELLA GMBH & CO KGAA +2
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Patent Information

Application Number
CN202380037232.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-03-21
Filing Date
2023-02-16
Publication Date
2024-12-17

AI Technical Summary

Technical Problem

The existing vehicle internal display device is difficult to compactly construct in a narrow structural space, and multiple light reflections lead to light and dark stripes imaging in the holographic image, affecting safety and personalized display.

Method used

Using multiple light sources and light conductors arranged side by side, a hologram is arranged on the light conductor. The light is directly reflected in the direction of the hologram by the reflection area to avoid multiple reflections. Combining light sources and holograms of different wavelengths to achieve a compact structure and personalized display.

Benefits of technology

It realizes the compact construction of the holographic display device in a narrow structural space, avoids light and dark stripes, improves the safety and personalized functions of the display, and is suitable for a variety of installation positions inside the vehicle.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a display device for a vehicle, which is designed to be integrated into the interior of the vehicle, comprising: a plurality of light sources (1); a plurality of light conductors (2), each of which has an incident surface (6) and a reflective region (7); the invention relates to a display device (1) for displaying light sources (1), comprising a plurality of light conductors (2), and a plurality of holograms (8), at least one of the holograms (8) being arranged on or in each of the light conductors (2), one of the light conductors (2) being associated with a respective at least one of the light sources (1) and the display device being designed to display the light sources (1). Light (3) emitted from the light source (1) is incident in each case in the direction of the reflective region (7) into the incident surface (6) of the associated light guide (2), is reflected in the interior of the light guide (2) by the reflective region (7) in the direction of the hologram (8), and interacts with the hologram (8).
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Description

Technical Field

[0001] The invention relates to a display device for a vehicle, which is designed to be integrated into the interior of the vehicle. Background Art

[0002] There are display devices that function as warning lights in the interior of a vehicle, for example, for lane change assistance or blind spot warning functions. If an overtaking vehicle is detected in the rear blind spot that is not visible to the driver through the side mirrors, a small warning light is illuminated in or on the exterior mirrors or inside in the mirror base or in the front corner of the side window. Similar functions are then also used, for example, as lane change assistance or driving course assistance in the case of own, possibly unintentional, lane changes.

[0003] Holographic lighting systems can strongly highlight and structure such warning functions and provide scenes with impressive depth and three-dimensional appearance, with the advantage that they provide greater attention and thereby increased safety compared to today's small luminous surfaces that can be easily overlooked.

[0004] It is desirable to integrate holograms into the lighting system or display device of the vehicle interior with the purpose of further developing the existing simple warning lights or indicator lights into display devices with three-dimensional luminous images. This achieves an increase in attention and recognizability and thereby an increase in driving safety. In addition, holographic display functions provide a basis for the trend towards personalization and customization, in that holograms can be individually configured with different, adapted graphics and illustrations. This makes it possible to very easily provide different images that cannot be achieved without holograms while maintaining the optical components, for example, to be able to easily use cultural, country-specific graphics and pictograms or texts in different ways and thus to individually coordinate the implementation of display functions to global requirements.

[0005] The installation of display devices in interior trim elements of the vehicle interior is characterized by a limited installation space and a small installation depth, since other installed parts, such as cable harnesses, absorption components, loudspeakers, airbag supply lines or the airbag itself, are often installed in the interior trim. Another reason for the limited installation space and small installation depth can be a correspondingly strongly formed body structure or supporting structure, which is formed from a plurality of sheet metal or components in order to ensure the rigidity of the passenger compartment and to ensure occupant protection in the event of a crash.

[0006] A display device of the type described at the beginning is known from DE 10 2019 206 025 A1. The display device described therein is used to display image information in the interior space of a vehicle. The display device has a light source configured as a light emitting diode (LED) and a flat optical waveguide, and the light of the light source is coupled into the end face of the optical waveguide. The coupled light is totally reflected multiple times between the front interface and the rear interface of the optical waveguide and guided through the entire optical waveguide surface in this way. In the optical waveguide, a plurality of holograms configured as reflection holograms are arranged approximately in the center between the front interface and the rear interface. Through the interaction of light and the hologram, a plurality of holographic images are generated, which can be perceived by a user in the interior space of the vehicle. There is the possibility that, in such a flat system, the multiple light reflections on the front interface and the rear interface are visible in the reconstructed hologram as alternating light and dark stripe images. In addition, in such a system, the angle at which the light is reflected on the front interface and the rear interface must conform to the illumination angle of the hologram, which is accompanied by relatively large expenditure. Summary of the invention

[0007] The problem underlying the present invention is to provide a display device of the type mentioned at the outset which has a simple construction and / or requires little installation space.

[0008] This is achieved according to the invention by a display device of the type mentioned in the introduction having the features of claim 1. The dependent claims relate to preferred embodiments of the invention.

[0009] According to claim 1, the display device has: a plurality of light sources; a plurality of light conductors, each of which has an incident surface and a reflection area, and the light conductors are arranged side by side; and a plurality of holograms, at least one of the holograms being arranged on or in each of the light conductors, wherein one of the light conductors is configured with a corresponding at least one of the light sources and the display device is designed to make the light emitted from the light source incident on the incident surface of the configured light conductor in the direction of the reflection area, reflected by the reflection area in the interior of the light conductor in the direction of the hologram and interact with the hologram. As a result, the display device can be constructed very compactly. In particular, the light is directly reflected by the reflection area in the direction of the hologram, thereby avoiding multiple reflections and thereby avoiding possible associated light and dark fringes in the reconstructed hologram. It can be provided that the direction in which the light conductors are arranged side by side is a horizontal direction or a vertical direction when the display device is installed in a vehicle. Therefore, the light conductors can also be arranged in an overlapping manner.

[0010] It can be provided that the average distance between each of the light sources and the reflective region of the configured light conductor is at least half as large as the average distance from the reflective region to the hologram, in particular, the average distance between the light source and the incident surface together with the average distance between the incident surface and the reflective region is 0.8 to 1.2 times as large as the average distance between the reflective region and the hologram. Here, the average distance between the incident surface and the reflective region can be at least half as large as the average distance from the reflective region to the hologram, and / or the average distance between the light source and the incident surface of the configured light conductor can be at least half as large as the average distance between the reflective region and the hologram. By the large distance between the light source and the reflective region, a long distance is generated, over which the light emitted from the light source can be extended in the lateral direction. This allows a large width extension of the light conductor and a space-saving compact structure, so that the display device can also be easily integrated into a small structural space.

[0011] The display device can be designed in a compact manner so that it is suitable for installation in different locations in the vehicle interior, for example integrated into the A-pillar, B-pillar or C-pillar or in the dashboard or center console or roof console or door or at any other location in the vehicle interior.

[0012] There is a possibility that each of the optical waveguides is equipped with two light sources and each of the optical waveguides has two incident surfaces and two reflection areas, and the display device is designed to make light emitted from a first light source of the two light sources incident on a first incident surface of the two incident surfaces of the optical waveguide in the direction of a first reflection area in the reflection area, reflected by the first reflection area in the interior of the optical waveguide in the direction of the hologram and interact with the hologram, and make light emitted from a second light source of the two light sources incident on a second incident surface of the two incident surfaces of the optical waveguide in the direction of a second reflection area in the reflection area, reflected by the second reflection area in the interior of the optical waveguide in the direction of the hologram and interact with the hologram. As a result, despite the compact size, the display device or optical waveguide can realize illumination of the hologram from two directions, for example, by arranging opposite light sources that cross-introduce light into the incident surfaces respectively opposite to the light sources.

[0013] It can be provided that two holograms are arranged on each of the optical waveguides, and in particular the display device is designed to interact a first hologram of the two holograms with light emitted from a first light source and a second hologram of the two holograms with light emitted from a second light source, so that two different holographic images can be generated from one optical waveguide.

[0014] Furthermore, it can be provided that the light emitted by the first light source has a different wavelength distribution, in particular a different color, than the light emitted by the second light source. As a result, the optical waveguide can be used for two different light colors, for example red and yellow or red and blue or red and green, in order to also image two functions or different warnings and instructions by means of a respective hologram for each of the light colors.

[0015] It is possible to configure each of the optical waveguides in a U-shaped manner with two legs and a connecting region between the two legs. This results in a compact component that can be easily installed in the interior of a vehicle.

[0016] Here, a first incident surface and in particular a first reflection region may be arranged on the first of the two legs, a second incident surface and in particular a second reflection region may be arranged on the second of the two legs, and the hologram or holograms may be arranged on or in the connecting region. This allows a very compact design of the display device.

[0017] It can be provided that the first light source is arranged on or in the region of the second leg and the second light source is arranged on or in the region of the first leg, the display device in particular having a holder for each light source or a holder for each of the light sources. The hologram or holograms are thus illuminated from two different directions, wherein the light sources, for example, lying opposite one another, direct light crosswise into the incident surfaces respectively lying opposite the light sources. This results in two overlapping beam paths, which contribute to the compactness of the display device.

[0018] It is possible that the display device is designed to generate an image composed of a plurality of individual holographic images by interaction of the light with holograms arranged on or in the individual light guides. The surface used for the holographic display is thereby enlarged.

[0019] It can be provided that the display device is designed to control the plurality of light sources so that the individual holographic images generated by the interaction of the light with the holograms arranged on or in the individual light guides are generated in a temporally staggered manner, in particular in order to generate a dynamic or animated composite image. For example, the plurality of light sources can be controlled sequentially when a display function is activated and / or deactivated, thereby introducing dynamics or animations into the holographic display, which increase attention and further improve safety. Thus, for example, warnings can also be set for the driver according to the level of danger.

[0020] It is possible for the display device to have a holding device on or in which the plurality of light sources and the plurality of light guides together with the plurality of holograms are held. The common holding device simplifies the adjustment of the individual parts relative to one another.

[0021] It can be provided that the holding device has at least one shading element in order to at least partially prevent unwanted light from entering the plurality of light guides, wherein the at least one shading element is preferably arranged in and / or starting from the connecting region between the individual light guides. In particular, the occurrence of blurring or double images in adjacent holographic images can thereby be reduced.

[0022] There is the possibility that the display device has a housing and / or at least one cover and / or at least one design shade. This can be a common cover for all light guides in the light guide. In addition, a design shade can be provided that surrounds the light exit surface of the light guide.

[0023] It may be provided that the display device is designed to be integrated into an A-pillar or a B-pillar or a C-pillar or a dashboard or a center console or a roof console or a door of the interior of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The invention will now be explained in more detail with reference to the accompanying drawings.

[0025] Figure 1 A perspective view showing a part of a display device according to the invention, wherein only the optical waveguide and the associated light source are shown;

[0026] Figure 2 Shown in accordance with Figure 1 another perspective view of the portion of the display device;

[0027] Figure 3 Shown in accordance with Figure 1 a cross-sectional view of the portion of the display device, including an exemplary light path of light emitted from one of the light sources;

[0028] Figure 4A perspective view of a display device is shown, wherein a plurality of light conductors and configured light sources are shown;

[0029] Figure 5 Shown in accordance with Figure 4 Another perspective view of the display device;

[0030] Figure 6 Shown is a housing according to Figure 4 A front view of a display device;

[0031] Figure 7 Shown without a cover, including the housing according to Figure 4 A perspective view of a display device;

[0032] Figure 8 The housing is shown without a cover and without a light shield. Figure 4 A perspective view of a display device;

[0033] Fig. 9 Shown without housing including holding device according to Figure 4 A perspective view of a display device;

[0034] Fig.10 Shown without housing including holding device according to Figure 4 Another perspective view of the display device;

[0035] Fig.11 Shown without housing including holding device according to Figure 4 a detail of a perspective view of a display device depicting an exemplary light path of light emitted from one of the light sources;

[0036] Fig.12 Shown without housing including holding device according to Figure 4 A side view of a display device depicting an exemplary light path of light emitted from one of the light sources;

[0037] Fig.13 Shown without housing including holding device according to Figure 4 Another detail of a perspective view of the display device;

[0038] Fig.14 Shown in accordance with Figure 4 A vertical cross-sectional view of a display device;

[0039] Fig.15 Shown in accordance with Figure 4 A horizontal cross-sectional view of a display device;

[0040] Fig.16 A first embodiment of an image generated by a display device according to the invention is shown;

[0041] Fig.17 A second specific embodiment of an image generated by the display device according to the invention is shown. DETAILED DESCRIPTION

[0042] In the figures, identical and functionally identical parts are provided with the same reference symbols.

[0043] The display device Figures 1 to 3 The part depicted in FIG. 1 comprises two light sources 1 and a light conductor 2. The light sources 1 are in particular designed as light emitting diodes (LEDs). Alternatively, the light sources 1 can also be designed as laser diodes.

[0044] The optical waveguide 2 is at least partially made of a material which is transparent to the light 3 of the light source 1. The optical waveguide 2 is substantially U-shaped with two legs 4 and a connecting region 5 between the two legs. The optical waveguide 2 can be relatively compact and have dimensions of, for example, between 20 mm and 40 mm in width, height and depth, in particular between 10 mm and 20 mm. Figure 3 The height is approximately 35 mm and the width and depth are approximately 25 mm.

[0045] The optical waveguide 2 has two incident surfaces 6 for the light 3 from the light source 1. In this case, one of the incident surfaces 6 is arranged on the inner side of one of the legs 4. In this case, the light source 1 is arranged next to the end of one of the legs 4 in each case, so that the light 3 emitted by the light source 1 is incident on the incident surface 6 of the other of the legs 4 (see Figure 3 ). In this way, the light 3 from the light source 1 to the entrance surface 6 travels a relatively long distance, which enables a suitably large expansion of the light beam incident into the entrance surface 6 .

[0046] The two entrance surfaces 6 are curved, in particular concavely curved. However, it is entirely possible for the entrance surfaces to be convexly curved or to be flat.

[0047] Furthermore, the optical waveguide 2 has two reflective regions 7, which are formed on the outer sides of the legs 4. The light 3 incident on the optical waveguide 2 through the incident surface 6 is reflected by the reflective regions 7 into the connecting region 5. Here, the display device can be designed to make the light 3 incident on the reflective regions 7 at an angle greater than the critical angle of total reflection relative to the vertical line, so that the light 3 is totally reflected when the surface of the reflective region 7 is correspondingly formed to be smooth. Alternatively or additionally, the surface of the reflective region 7 can be silver-plated.

[0048] The connecting region 5 forms an exit surface on the side facing away from the supporting leg 4, and the light 3 emitted from the reflecting region 7 is incident on the exit surface, and the incident light 3 at least partially penetrates the exit surface. Figures 1 to 3 The parts depicted include holographic Figure 8 The hologram is applied from the outside, in particular glued to the exit surface, in particular in the form of a volume hologram read into the film. Figure 8 The image in can be reconstructed to achieve the desired display function.

[0049] The holographic Figure 8 is a transmission hologram with which the light penetrating from the exit face can interact. In the case where the incident angle between the incident light 3 and the vertical line on the exit face is relatively large, the hologram Figure 8 It is also an edge-lit hologram because the lighting angle (the hologram Figure 8 must be illuminated at said illumination angle in order to reconstruct the holographic image) is relatively large.

[0050] By means of a relatively large illumination angle it is possible in particular to prevent the 0th order of the utilized light from becoming disturbingly visible to an observer.

[0051] The reflection region 7 is convexly curved and is in particular designed as a parabolic surface. This curvature ensures that the parts of the light 3 incident on the reflection region 7 at different angles are reflected into the connection region 5 in substantially the same direction. The substantially mutually parallel rays of the light 3 ensure holographic Figure 8 This is beneficial for the effective reconstruction of the holographic image.

[0052] Alternatively, it may be provided that the reflective region 7 is designed as a free-form surface in order to enable further optimization of the illumination or to enable an optimized adaptation of the light 3 coupled into the light source 1. The reflective region 7 may alternatively be provided with additional optics depending on the desired light shaping of the reflected light 3.

[0053] Since the distance traveled by the light from the light source 1 to the reflecting area 7 is relatively long, the reflecting area can also be along the Figure 3 The direction extending into the plane of the image is illuminated relatively completely, so that despite the compactness of the light guide 2 a relatively wide hologram can be achieved. Figure 8 lighting.

[0054] It may be provided that two holographic Figure 8 The two holograms can be applied, for example one above the other, to the outer side of the exit surface of the light guide 2. In particular, the two holograms Figure 8 can be read into the same film. Figure 8 It may be possible to write with light of a different wavelength, so that the hologram must also be reconstructed with light of a different wavelength.

[0055] In this case, the two light sources 1 can have different wavelength distributions, in particular different colors. As a result, the optical waveguide 2 can be used for two different light colors, for example red and yellow or red and blue or red and green, in order to use a respective hologram for each of the light colors. Figure 8 Two different images are also reconstructed.

[0056] Alternatively, it is also possible to provide only one hologram Figure 8 And only one light source 1, one incident surface 6 and one reflection region 7. In this case, the optical waveguide can be reduced in terms of its height, since the complete incoupling region and the reflection region are not utilized.

[0057] exist Figures 4 to 15 It is explained in FIG. 1 that the display device has a plurality of light conductors 2, in which Figures 4 to 15 3 optical waveguides 2 arranged side by side are depicted in FIG. Here, the number of optical waveguides 2 is selected only by way of example. It is entirely possible to provide only two optical waveguides 2 arranged side by side. Alternatively, more than three optical waveguides 2 arranged side by side, for example four optical waveguides 2 or five optical waveguides 2 or more than five optical waveguides 2 may also be provided.

[0058] The three optical waveguides 2 are respectively assigned two light sources 1, wherein the corresponding three light sources 1 are arranged on a common circuit board 9, which extends in the direction in which the optical waveguides 2 are arranged side by side. Figures 1 to 3 Arranged as described in .

[0059] Each optical waveguide 2 is provided with at least one holographic Figure 8 , so that holographic images adjacent to each other can be reconstructed by interaction with the light 2 of the corresponding light source 1.

[0060] The display device Figures 4 to 15 The embodiment depicted in FIG. 1 comprises a holding device 10 and a housing 11 which surrounds the light conductor 2 at the rear and sides. A cover 12 and a design shade 13 are arranged on the front side of the housing 11. The cover 12 covers the exit surface or holographic surface of the light conductor 2. Figure 8 The light shield 13 is designed to surround the exit surface of the light conductor 2 or the holographic Figure 8 , in order to obtain an attractive construction of the display device.

[0061] Depending on the installation of the display device in the vehicle, it is possible to dispense with the cover 12, for example if a larger cover is provided at the installation site behind which the display device can be placed. If a housing is not necessary in a protected installation environment, the housing 11 may also be dispensed with.

[0062] The holding device 10 has two shading elements 14 on the back side of the optical waveguide 2 or on the side of the optical waveguide 2 facing away from the exit surface. The two shading elements 14 each start from the connection area between the individual optical waveguides 2 and extend from the optical waveguide 2 into the intermediate space between the circuit boards 9. In this way, the shading elements 14 can at least partially prevent the entry of undesired light from the light source 1 into the optical waveguide 2 assigned to the adjacent light source 1 (see in particular Fig.11 ). In particular, the occurrence of blurring or double images in adjacent holographic images can thereby be reduced.

[0063] The holding device 10 has further shading elements 15, 16 which cover parts of the optical waveguide 2 in order to largely prevent unwanted light from entering the optical waveguide 2 from one of the light sources (see in particular Fig.14 ).

[0064] The display device can, for example, fulfill a warning function and a prompting function. To this end, the display device can control a plurality of light sources 1 so that the light 3 is connected to the hologram arranged on or in each light conductor 2. Figure 8 The individual holographic images reconstructed by the interaction of the light sources 1 are generated in a time-staggered manner, in particular in order to produce a dynamic or animated composite image. For example, when activating and / or deactivating a display function, multiple light sources 1 can be controlled sequentially, thereby introducing dynamics or animations into the holographic display, which increase attention and further improve safety. Thus, for example, warnings can also be set for the driver according to the risk level.

[0065] Fig.16 A display of a display device is shown which consists of three holographic images 17. The display device may be part of a blind spot assistant and use animations to represent vehicles located in the blind spot.

[0066] Fig.17 A display of a display device is shown, which also consists of three holographic images 17. The display device may be part of a lane change assistant and use animations to represent oncoming vehicles that hinder the lane change.

[0067] As image 17, in the at least one holographic Figure 8 Any pictograms, text or other content of any type can be stored in it.

[0068] Here, the generated image 17 can be animated in two directions (from top to bottom or vice versa or from left to right or vice versa). In addition, the brightness of individual objects in the holographic image 17 or individual sections of the image can be varied, for example, the brightness can be varied from low to bright for a graded warning effect.

[0069] Depending on the installation location in the vehicle, the viewing angle range for the holographic function can be defined differently. For example, if a blind spot warning and a lane change assistant are provided as functional elements in the A-pillar, the visible range of the hologram function on the left driver's side and another visible range of the hologram function for the right passenger side can be designed to be narrowed for the position of the driver. By using holograms, the eyebox or viewing angle range can be designed to be limited to the driver, so that a high light density or brightness can also be achieved with less light in the holographic system.

[0070] Independently of this, any desired eye movement range can be defined and implemented for other installation situations, either for a specific seat or also for a plurality of seats in the vehicle.

[0071] Reference numerals list

[0072] 1 Light Source

[0073] 2 Photoconductor

[0074] 3 Light from the source

[0075] 4 Legs for the light conductor

[0076] 5 Connection area between the legs of the light conductor

[0077] 6 Incident surface of the light conductor

[0078] 7Reflection area of ​​the light conductor

[0079] 8. Hologram

[0080] 9 Common circuit board for light source

[0081] 10 Holding device

[0082] 11 Shell

[0083] 12 Covering Hood

[0084] 13. Design sunshades

[0085] 14 Shading elements

[0086] 15 Shading element

[0087] 16 Shading elements

[0088] 17 Holographic Image

Claims

1. A display device for a vehicle, the display device being designed to be integrated into the interior space of the vehicle, the display device having - multiple light sources (1), - a plurality of light conductors (2), each of which has an incident surface (6) and a reflection region (7), the light conductors (2) being arranged next to one another, and a plurality of holograms (8), at least one of the holograms (8) being arranged on or in each of the light guides (2), -in, One of the optical waveguides (2) is assigned a respective at least one of the light sources (1), and the display device is designed to cause the light (3) emitted from the light source (1) to be incident on the incident surface (6) of the assigned optical waveguide (2) in the direction of the reflection region (7), to be reflected by the reflection region (7) in the interior of the optical waveguide (2) in the direction of the hologram (8), and to interact with the hologram (8).

2. The display device according to claim 1, characterized in that The average distance between each of the light sources (1) and the reflective region (7) of the associated light guide (2) is at least half as large as the average distance from the reflective region (7) to the hologram (8), in particular, the average distance between the light source (1) and the incident surface (6) together with the average distance between the incident surface (6) and the reflective region (7) is 0.8 to 1.2 times as large as the average distance between the reflective region (7) and the hologram (8).

3. The display device according to claim 2, characterized in that The average distance between the incident surface (6) and the reflection area (7) is at least half as large as the average distance from the reflection area (7) to the hologram (8), and / or the average distance between the light source (1) and the incident surface (6) of the associated light guide (2) is at least half as large as the average distance between the reflection area (7) and the hologram (8).

4. The display device according to any one of claims 1 to 3, characterized in that Each of the optical waveguides (2) is provided with two light sources (1), and each of the optical waveguides (2) has two incident surfaces (6) and two reflection regions (7). The display device is designed to allow light (3) emitted from a first light source of the two light sources (1) to be incident on a first incident surface of the two incident surfaces (6) of the optical waveguide (2) in the direction of a first reflection region of the reflection regions (7), to be reflected by the first reflection region (7) in the interior of the optical waveguide (2) in the direction of the hologram (8) and to interact with the hologram (8), and to allow light (3) emitted from a second light source of the two light sources (1) to be incident on a second incident surface of the two incident surfaces (6) of the optical waveguide (2) in the direction of a second reflection region of the reflection region (7), to be reflected by the second reflection region (7) in the interior of the optical waveguide (2) in the direction of the hologram (8) and to interact with the hologram (8).

5. The display device according to any one of claims 1 to 4, characterized in that Two holograms (8) are arranged on each of the optical waveguides (2); in particular, the display device is designed to make a first hologram of the two holograms (8) interact with light (3) emitted from a first light source (1) and to make a second hologram of the two holograms (8) interact with light (3) emitted from a second light source (1).

6. The display device according to claim 4 or 5, characterized in that The light (3) emitted by the first light source (1) has a different wavelength distribution, in particular a different color, than the light (3) emitted by the second light source (1).

7. The display device according to any one of claims 1 to 6, characterized in that Each of the optical waveguides (2) is designed in a U-shaped manner with two legs (4) and a connecting region (5) between the two legs (4).

8. The display device according to claim 7, characterized in that A first incident surface (6) and, in particular, a first reflection region (7) are arranged on the first of the two legs (4), a second incident surface (6) and, in particular, a second reflection region (7) are arranged on the second of the two legs (4), and one or more holograms (8) are arranged on or in the connecting region (5).

9. The display device according to any one of claims 4 to 8, characterized in that The first light source (1) is arranged on the second leg (4) or in the area of ​​the second leg (4) and the second light source (1) is arranged on the first leg (4) or in the area of ​​the first leg (4), and the display device in particular has a holding portion for each of the light sources (1) or a holding portion for each of the light sources (1).

10. The display device according to any one of claims 1 to 9, characterized in that The display device is designed to generate an image composed of a plurality of individual holographic images (17) by interaction of the light (3) with a hologram (8) arranged on or in the individual light guides (2).

11. The display device according to any one of claims 1 to 10, characterized in that The display device is designed to control the plurality of light sources (1) so that the individual holographic images (17) generated by the interaction of the light (3) with the holograms (8) arranged on or in the individual light guides (2) are generated in a temporally staggered manner relative to one another, in particular in order to generate a dynamic or animated composite image.

12. The display device according to any one of claims 1 to 11, characterized in that The display device comprises a holding device (10) on or in which the plurality of light sources (1) and the plurality of light guides (2) together with the plurality of holograms (8) are held.

13. The display device according to claim 12, characterized in that The holding device (10) has at least one shading element (14, 15, 16) in order to at least partially prevent unwanted light from entering the plurality of optical waveguides (2), the at least one shading element (14, 15, 16) preferably being arranged in a connection region between the individual optical waveguides (2) and / or starting from a connection region between the individual optical waveguides (2).

14. A housing (11) and / or at least one cover (12) and / or at least one designed sunshade (13).

15. The display device according to any one of claims 1 to 14, characterized in that The display device (10) is designed to be integrated into an A-pillar, a B-pillar, a C-pillar, a dashboard, a center console, a roof console, or a door of the interior of the vehicle.

Citation Information

Patent Citations

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    DE102019206025A1