CN112014972A

CN112014972A - Display device of a field of view display apparatus of a vehicle, related display apparatus and method

Info

Publication number: CN112014972A
Application number: CN202010466774.9A
Authority: CN
Inventors: R.费斯; B.特伦克; T.沃纳
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2019-05-29
Filing date: 2020-05-28
Publication date: 2020-12-01
Also published as: FR3096790B1; DE102019207898A1; FR3096790A1

Abstract

The invention relates to a display device of a field of view display apparatus of a vehicle, a related display apparatus and a method. The solution presented here relates to a display device (100) for a vehicle (200). A display device (100) has a waveguide (205) and a display surface (210). The waveguide (205) has: -an in-coupling structure (215) for in-coupling a first light (220), the first light representing a first image generated by an image generating device (225); a guiding structure (230) for guiding at least one light component of the first light (220) through the waveguide; and an out-coupling structure (235) for coupling out the light component from the waveguide to enable a virtual representation (110) of the first image in a first representation area arranged remote from the waveguide. The display surface (210) is arranged in or at the waveguide and is configured to radiate second light (240) representing the second image so as to cause a realistic representation (115) of the second image on the display surface (210).

Description

Display device of a field of view display apparatus of a vehicle, related display apparatus and method

Technical Field

This solution (Ansatz) starts from a device or a method according to the preambles of the independent claims.

Background

DE 102011088794 a1 describes a projection device and a method for projecting an image into the visible range of the driver of a vehicle.

Disclosure of Invention

Against this background, with the solution presented here, a display device for a field-of-view display apparatus of a vehicle according to the main claim is presented, in addition to a field-of-view display apparatus with a display device, an information display apparatus or a vehicle according to the main claim and a method for operating a display device are presented. By the measures cited in the dependent claims, it is possible to advantageously improve and improve the device described in the independent claims.

An advantage that can be achieved with the described solution is that a simply constructed display device is proposed, which enables a clear illustration (Darstellung) of the image for the user not only in the near region but also in the far region.

A display device for a field-of-view display apparatus of a vehicle has a waveguide and a display surface. The waveguide has: -a coupling-in structure for coupling in a first light (Einkoppeln), said first light representing a first image generated by the image generating means; a guiding structure for guiding at least one light component (Lichtanteil) of the first light through the waveguide; and an output coupling structure (AuskopplungssTruktur) for coupling out the light component from the waveguide so as to enable virtual illustration of the first image in a first illustration region disposed away from the waveguide. The display surface is arranged in or at the waveguide and is configured to radiate second light representing the second image so as to cause a realistic illustration of the second image on the display surface.

The visual field Display device may be a so-called "heads-up Display" (abbreviated as "HUD (Head-up-Display)") configured to widen a visual field of a user of the vehicle so as to project information into the visual field of the user. The virtual representation of the first image, which is generated using the display device described here, is perceptible to the user as a far view (Fernansicht). The image distance of the generated virtual first image may in this case be at infinity. While the second image may be perceived as a realistic illustration because the second image is actually radiated by the display surface and thus has a limited image distance. The second image can be generated, for example, using an image generating device, wherein the display surface can in this case be the projection surface: the projection surface radiates the second image generated by the image generating means onto the projection surface, or the display surface may be formed using a display comprising a display surface, the display generating the second image. The actual representation of the second image is perceptible to the user in a second representation area which represents a representation area which is closer than the first representation area. The real illustration of the second image can thus be perceived as a close-up view (Nahansicht), i.e. where the display surface is actually located. The content of the first image and the second image may be the same. However, the content of the first image may also be different from the content of the second image. The guiding structure may be shaped so as to guide the first light coupled into the in-coupling structure to the out-coupling structure.

The display device described here advantageously enables a plurality of images to be represented in differently perceptible representation areas or at differently perceptible representation distances using a small number of components.

The out-coupling structure and the display surface may at least partly overlap. This enables a space-saving layout of the components. In this way, it is also possible for the user to simultaneously and additionally or alternatively to illustrate the first image and the second image superimposed. Depending on the embodiment, the coupling-out structures can also be arranged in a planar manner on the projection surface, for example over the entire surface of the projection surface.

The out-coupling structure may be at least partially arranged between the display surface and the in-coupling structure. In this way, in one embodiment, the coupling-in structure can be arranged outside the display region, wherein the light component can be guided by means of the guide structure to the display surface in order to be coupled out subsequently in a region in front of or behind the display surface, in order to be able to achieve an overlap of the display regions. The light components can additionally or alternatively also be coupled out from the level below the display surface (Ebene) and additionally or alternatively from the level above the display surface, whereby overlapping of the image areas can be avoided at least in sections or completely. For example, the virtual representation may thus be perceived at least partly below the real representation or above the real representation.

The display surface may be transparent for the light components coupled out by the out-coupling structures. Additionally or alternatively, the out-coupling structure may be transparent for the second light radiated by the display surface. The coupling-out structures and the display surface can therefore be arranged in any desired sequence one behind the other or on top of the other without interfering with one another when the respective light is radiated or coupled out. The image generating means can be arranged for generating light in a manner which is directed either onto the display surface or onto the coupling-out structure, respectively, as desired.

The display surface can be shaped, for example, by a holographic plate (Hologramm) in the coupling-out structure and additionally or alternatively by a scattering surface in the coupling-out structure. In this way, the display surface can be used as a projection surface: the projection surface can radiate the second image in a defined direction when the second light generated by the image generating device is directed onto the holographic plate and additionally or alternatively onto the scattering surface.

The display device may also have an image generating device, which may be a projector. According to an embodiment, the image generating device can be movably shaped and configured to emit a first light and a second light, wherein the display surface can be shaped as a projection surface for the second light. For example, the image generating device may emit the second light onto the projection surface in a first setting (Stellung), and emit the first light onto the incoupling structure in a second setting. In this way, the view image generation means may either cause a virtual representation of the first image or may cause a real representation of the second image, depending on the settings of the device.

Alternatively, the image generating device may however also be designed to emit a first light and a second light, wherein the coupling-in structure may be designed in a switchable manner in order to guide the first light to the guide structure in a first switching state (schaltzstan) and to guide the second light to the deflection element in a second switching state for deflecting the second light to the display surface shaped as the projection surface. In this way, an immovable image generating apparatus can be employed. The switchable input coupling structure may be, for example, an optical element, such as a holographic optical element.

Alternatively, the image generating device may however also be configured so as to emit the first light and the second light simultaneously, wherein for the second light the display surface may be shaped as a projection surface.

For example, in this case, the light cone of the image generating device may partially illuminate the projection surface and partially illuminate the coupling-in structure, so that a virtual representation of the first image in the far range and a real representation of the second image in the near range can be brought about simultaneously and additionally or alternatively in superposition.

However, according to another embodiment, the image generating device can also be designed to emit the first light, wherein the display device can also have a display for generating the second light, which display comprises a display surface. Such a display may also be used to cause a realistic illustration of the second image.

It is also advantageous if the display device has the following means: the device is designed to recognize and additionally or alternatively track the gaze direction of the user (nachvolgen) and additionally or alternatively recognize and additionally or alternatively track the head position of the user. The means may comprise so-called "eye tracking" and additionally or alternatively "head tracking" means. In this way, at least the first light may be generated or deflected depending on the gaze direction of the user and additionally or alternatively depending on the head position of the user, for example in order to always track the virtual illustration in the pupil of the user.

The field-of-view display apparatus, the information display apparatus, or the vehicle has one of the display devices described above. Such a visual field display apparatus, information display apparatus, or vehicle can, because the display device is this: the user is enabled to realize both an optically perceptible representation in the near zone and an optically perceptible representation in the far zone.

Furthermore, a method for operating one of the display devices described above is described. The method has a generation step in which a first image is generated using an image generation device, in order to enable a virtual representation of the first image in a first representation area.

In the generating step, the first image may be generated by: the image generating means are arranged in such a way as to be aligned with the coupling-in structure of the display device, so that a virtual representation of the first image can be realized in the first representation area.

In the generating step, the first image may be generated by: the image generating device is arranged in such a way that it is aligned with the coupling-in structure of the display device, wherein, in the case of use of the image generating device, a second image is also generated in order to simultaneously bring about a realistic representation of the second image in the second representation area in or at the waveguide.

The method may also have a movement step in which the image generating device is moved, wherein the second image is aligned with the projection area of the display device using the image generating device, in order to produce a real representation of the second image in the second representation area in or at the waveguide.

Alternatively, however, the method may also have a further generation step in which, using a display for generating the second light, which display comprises a display surface, the second image is generated in order to generate a real representation of the second image in the second representation region in or at the waveguide.

The method can be implemented, for example, in a control unit, for example, in software or in hardware or in a hybrid form of software and hardware.

Drawings

Embodiments of the solution presented herein are illustrated in the drawings and are set forth in more detail in the description that follows. In the drawings:

fig. 1 shows a schematic side view of a display device according to an embodiment;

FIG. 2 shows a schematic cross-sectional illustration of a vehicle having a display device according to an embodiment;

fig. 3 to 7 respectively show schematic cross-sectional illustrations of a display device according to an embodiment; and

fig. 8 shows a flowchart of a method for operating a display device according to an embodiment.

Detailed Description

In the following description of advantageous embodiments of the solution, the same or similar reference numerals are used for elements shown in different figures and functioning similarly, wherein repeated descriptions of these elements are omitted.

Fig. 1 shows a schematic side view of a display device 100 according to an embodiment.

The display device 100 is designed for use in or at a field of view display device, information display device and/or vehicle. According to an embodiment, the display device 100 is part of a combination meter in a passenger car, part of a transparent combined HUD (Combiner-HUD) with an illustration of the combination meter, integrated in a center console of a vehicle with an information display without reading glasses, or realized as a 3D display of an entertainment device or a household device.

The display device 100 is configured to: so as to couple in, guide and in turn couple out first light representing a first image generated by the image generating device; so that a virtual representation 110 of the first image can be realized in a first representation area 105 arranged remote from the display device 100. Further, the display device 100 is configured to: so as to radiate second light representing a second image; in order to cause a realistic illustration 115 of the second image on the display device 100.

For the user 120 of the display device 100, the first illustration area 105 is to be understood as a far zone which is located at an infinite distance from the user 120, for example. The real representation 115 of the second image is perceptible to the user 120 in a second representation area 125, which second representation area 125 represents a closer and/or limited representation area compared to the first representation area 105. The real representation 115 of the second image is thus performed in the near zone according to this embodiment.

In order to make the virtual representation 110 of the first image and the real representation 115 of the second image perceivable to the user 120, the display device 100 is shaped such that light is emitted that represents the images in the direction of the user 120.

Fig. 2 shows a schematic cross-sectional illustration of a vehicle 200 with a display device 100 according to an embodiment. The display device 100 described with reference to fig. 1 may be used here.

Merely by way of example, the display device 100 is arranged in the vehicle 200 or at the vehicle 200 according to the exemplary embodiment. In this case, the display apparatus 100 is exemplarily part of a field-of-view display device of the vehicle 200. According to an alternative embodiment, the display apparatus 100 is arranged in or at an information display device, which may be part of a household appliance, for example.

The display device 100 has a waveguide 205 and a display surface 210. The waveguide 205 has: an in-coupling structure 215 for in-coupling a first light 220, the first light 220 representing a first image generated by an image generating means 225; a guiding structure 230 for guiding at least one light component of the first light 220 through the waveguide 205; and an out-coupling structure 235 for coupling out the light component from the waveguide 205 to enable a virtual representation 110 of the first image in a first representation area arranged remote from the waveguide 205. For this purpose, the light component is coupled out by the coupling-out structure 235 in the direction of the user 120. The display surface 210 is arranged in the waveguide 205 or at the waveguide 205 and is configured to: so as to radiate second light 240 representing a second image; so as to cause a realistic illustration 115 of the second image on the display surface 210. For this purpose, the second light 240 is radiated toward the user 120.

According to this embodiment, the out-coupling structures 235 and the display surface 210 at least partially overlap. According to this embodiment, the out-coupling structures 235 are arranged in a planar distribution onto the display surface 210, according to this embodiment in a distribution over the entire face of the display surface 210. According to an embodiment, the display surface 210 is shaped by a holographic plate and/or a scattering surface in the out-coupling structure 235. The out-coupling structure 235 is according to this embodiment at least partly arranged between the display surface 210 and the in-coupling structure 215. The display surface 210 is according to this embodiment transparent for the light component coupled out by the out-coupling structures 235, or the out-coupling structures 235 are transparent for the second light 240 radiated by the display surface 210.

According to this embodiment, the display device 100 further comprises an image generation device 225. According to this embodiment, the image-producing device 225 is movably shaped and configured to emit the first light 220 and the second light 240, wherein the display surface 210 is shaped as a projection surface for the second light 240. In this regard, the image generation device 225 is configured to: in a first setting, so as to emit second light 240 onto the projection surface; and in a second setting, so as to emit the first light 220 onto the incoupling structure 215. Thus, depending on the setting of the view image generation means 225, either a virtual representation 110 of the first image or a real representation 115 of the second image can be caused for the user 120, according to this embodiment. The coupling-in structure 215 is arranged according to this embodiment at the end of the waveguide 205 facing away from the projection plane and/or on a waveguide plane of the waveguide 205 opposite the projection plane.

In the following, the details of the display device 100 are described more precisely once more:

currently, so-called Augmented-Reality heads-up displays (abbreviated as "ARHUDs") are being developed, which can also show image content (e.g. navigation prompts, ACC symbols) in addition to the information already shown in HUDs (e.g. speed, traffic sign recognition) so that these image content appear to merge with the driving scene. Also, the number of products capable of illustrating or obtaining 3D image content in the consumer goods field, such as 3D TVs, is increasing. Common to these applications is the following requirement: the image content can be illustrated in different depth levels. Conventional displays achieve sharp imaging only directly at the screen level. The HUD is designed such that the image content is displayed clearly in a certain image distance. The same applies to a so-called Head-Mounted Display (abbreviated as "HMD"), i.e., a visual Display device that is Mounted on the Head.

Conventional displays produce a real image at the display level. The HUD generates a virtual image in a predefined image distance. By means of the waveguide 205 provided with the incoupling structure 215 and the outcoupling structure 235, a virtual image can be generated, the image distance of which is at infinity. According to an embodiment, the waveguide 205 is fabricated with high optical transparency. The display device 100 described herein now advantageously enables the combination of the waveguide 205 and display technology with limited image distance. This enables the illustration of content for limited to infinite image distances. Furthermore, with suitable superimposition, the intermediate distances can be generated in order to enhance or make as large an area of the real world as possible useful for the image content.

Light field displays when illustrating large image distances are as large as poor resolution, while in an autostereoscopic scheme, accommodation and convergence may lead to visual conflict (Sehkonflikt) at the user 120.

The combination of a display surface 210 in the form of a display or a projection surface for a real image with a small image distance and a waveguide 205 for a virtual image at infinity, said waveguide 205 having a coupling-in structure 215 and a coupling-out structure 235, enables the content to be illustrated in the illustrated region to be varied arbitrarily.

Advantageously, the display device 100 described here enables very good resolution in this case even at large image distances, so that no visual conflict is formed at the user 120. In this case, the display device 100 can realize clear imaging of information not only in a certain image distance but also advantageously in an image distance of infinity. The display apparatus 100 can achieve enhancement of the environment. The illustration of information in a larger image distance that can be achieved in this case enables a faster adaptation of the eyes of the user 120, which is an important safety aspect. The representation of the information (e.g. speed, time) furthermore enables reading without visual aid in the case of visual defects like presbyopia of the elderly. If the graphic hierarchy is not needed or is annoying to the user 120, the graphic hierarchy is turned off using the turn-off device of the display device 100 according to an embodiment. The existing display surface 210 or display system can be expanded quickly, easily and cost-effectively by means of the described waveguide 205.

Using a waveguide 205 with an in-coupling structure 215 and an out-coupling structure 235, the in-coupling structure 215 and the out-coupling structure 235 can also be referred to as an in-coupling face and an out-coupling face or as an in-coupling structure and an out-coupling structure (Ein-und austoppels truktur). The image content is projected onto the coupling-in surface by means of an image generating device 225 in the form of a projector. The incoupling structure 215 converts the position of each beam of first light 220 into an angle. The angular range of all points is below the angle of total reflection (unterhalt), so the first light 220 is reflected back and forth in the waveguide 215. The out-coupling structures 235 couple out a portion of the internally reflected light. Thereby, imaging at infinity is achieved. The waveguide 205 is transparent according to this embodiment and may also serve as the display surface 210. In this regard, the surface of the waveguide 205 is shaped in a functional manner according to this embodiment, for example with a holographic plate and/or a suitable scattering surface. According to an alternative embodiment, a display is placed before or after the waveguide 205 in order to illustrate the image content, as described in fig. 5. In both cases, the image location is directly on the waveguide 205. Thus, the content can be illustrated both clearly on the waveguide 205 and at infinity (or in a very large distance). A sophisticated combination of the illustrated elements may be used in order to create the impression that: the image content is in an intermediate level, which may occur by additive superposition. Further, according to this embodiment, the display device 100 has the following devices: the device is configured to identify and/or track the gaze direction and/or head position of the user 120. The device may be a so-called "eye tracking" and/or "head tracking" unit. Alternatively, the display device 100 may be combined with such a device. In this way, the content may be dynamically adapted to the head position or gaze direction of the user 120, which user 120 may also be referred to as observer. According to an exemplary embodiment, the display device 100 furthermore has a computing device which is designed to correctly calculate the position of objects having different image distances in order to be able to realize a correct representation. In this way, the system efficiency is improved, and a small eye movement range (Eyebox) follows the user 120.

Unlike in other display devices in which the projection element is used on the one hand as a projection surface and on the other hand as a waveguide, in which the coupling-out structures serving as projection surfaces of the waveguide are located at the edge of the projection surface and can be used to visually illustrate information to the driver, the coupling-out structures 235 are arranged in the display device 100 described here at least in part in a planar fashion on the projection surface.

According to this embodiment, the projector is used for a close-up view and a far-view. In this regard, in a second setup of the projector, the first image is coupled in into the waveguide 205 via a coupling-in structure 215 in the form of an optical system; or in a first setting of the projector the second image is projected directly onto the projection surface. According to this embodiment, the conversion is performed via rotation of the projector; or according to an alternative embodiment, the switching is performed via an intermediate connected optical element, such as a mirror. The maximum resolution is achieved separately, but the

illustrations

110, 115 are not shown at the same time.

Fig. 3 shows a schematic cross-sectional illustration of a display device 100 according to an embodiment. The display device 100 described in fig. 2 may be referred to here, with the difference that the generating device 225 is shaped immovably.

According to this embodiment, the image generation device 225 is configured so as to emit first light 220 and second light 240, wherein the incoupling structure 215 is configured in a switchable manner according to this embodiment so as to guide the first light 220 to the guiding structure in a first switching state and to guide the second light 240 to the deflection element 300 in a second switching state for deflecting the second light 240 to the display surface 210 shaped as a projection surface. The switchable input coupling structure 215 is shaped as an optical element according to this embodiment, and as a holographic optical element (shortly referred to as "HOE") according to this embodiment. The incoupling structure 215 is either switched to be transparent according to this embodiment, whereby the second light 240 can pass through the incoupling structure 215 and travel the projection surface. Alternatively, the in-coupling structure 215 functions as an input coupling structure to guide the first light 220 into the waveguide 205, thereby illustrating information in the distal region. Maximum resolution is achieved separately, but not simultaneously. No movable parts are required.

According to an embodiment, the image-generating device 225 and the in-coupling structure 215 are jointly manipulated (angeltech) such that the in-coupling structure 215 occupies the first switching state when the image-generating device 225 emits the first light 220 and the in-coupling structure 215 occupies the second switching state when the image-generating device 225 emits the second light 240.

The deflecting element 300 is shaped according to this embodiment as a mirror: the mirror is arranged on the side of the waveguide 205 facing away from the generating means 225. The deflecting element 300 is oriented so as to deflect the second light 240 onto the projection surface.

Fig. 4 shows a schematic cross-sectional illustration of a display device 100 according to an embodiment. Here, reference may be made to the display device 100 described in fig. 3, with the difference that the generating means 225 is configured according to this embodiment so as to emit the first light 220 and the second light 240 simultaneously.

The in-coupling structure 215 is shaped in a non-switchable manner according to this embodiment. According to this embodiment, the display surface is shaped as a projection surface for the second light 240. According to this embodiment, the generating means 225 shaped as a projector partially illuminates the incoupling structure 215 and partially illuminates the projection surface. Thereby, information is illustrated with respectively reduced image resolution in the near zone and the far zone at the same time.

Fig. 5 shows a schematic cross-sectional illustration of a display device 100 according to an embodiment. The display device 100 described in fig. 3 may be referred to herein, with the difference that the display device 100 has a display 500 comprising a display surface 210 for generating the second light.

The display surface 210 is not shaped as a projection surface according to this embodiment. The image generating means 225 is configured according to this embodiment such that only the first light 220 is emitted to the incoupling structure. The coupling-in structure is shaped in a non-switchable manner according to this embodiment.

The display device 100 described herein implements a combination of near view and far view in the case of using the display 500. The display 500 is shaped according to this embodiment as a TFT display or as an OLED display or as a μ LED display for the illustration of information in the near zone, i.e. at the display level. A waveguide mounted on the display 500 or a waveguide disposed behind the display 500 according to this embodiment is used for the far zone. The waveguide is transparent according to this embodiment, so that these areas, i.e. the virtual representation and the real representation, can be represented simultaneously. The TFT display is illuminated via a waveguide according to an embodiment. Thus, the display can be used as a display in the near zone or switched to be transparent so as to enable a display in the far zone. The display unit 210 may be transparently implemented. In combined applications, for example also with transparent μ LEDs or OLED displays.

Fig. 6 shows a schematic cross-sectional illustration of a display device 100 according to an embodiment. The display device 100 described with reference to fig. 4 may be referred to here, with the difference that the coupling-out structures 235 are not arranged in a planar distribution on the display surface 210 according to this embodiment. The out-coupling structures 235 are arranged in a hierarchy between the in-coupling structures and the display surface 210 according to this embodiment. The out-coupling structures 235 are in this case arranged completely between the display surface 210 and the in-coupling structures 215 according to this embodiment. According to this exemplary embodiment, the generating device 225 is designed to generate the first light and the second light simultaneously, wherein the overlapping of the regions shown in the drawing may be omitted. The real representation 115 and the virtual representation 110 are thus perceptible to the user to be arranged one above the other.

Fig. 7 shows a schematic cross-sectional illustration of a display device 100 according to an embodiment. Here, reference may be made to the display device 100 described in accordance with fig. 4, with the difference that the out-coupling structures 235 are arranged according to this embodiment in a manner extending beyond the face of the display surface 210. The out-coupling structures 235 according to this embodiment further extend into the area between the display surface 210 and the in-coupling structures 215. The real illustration 115 and the virtual illustration 110 are thus arranged in a manner that is perceptible to the user as overlapping, wherein the section 700 of the virtual illustration 110, which is lower according to this embodiment, is perceptible below the overlapping

illustrations

110, 115.

According to an alternative embodiment, the out-coupling structures 235 additionally or alternatively extend further into the region beyond the display surface 210, wherein the section of the virtual representation 110 which is upper according to this alternative embodiment is perceptible above the overlapping

representations

110, 115.

All of the variants of the display device 110 described in fig. 1 to 7 can be operated in a reflective or transmissive manner, i.e. the projector is arranged either in front of or behind the display surface 210 or in front of or behind the entire display.

Fig. 8 shows a flow diagram of a method 800 for operating a display device according to an embodiment. Reference may be made herein to a display device as described with reference to one of the preceding figures.

The method 800 has a step 805 of generating a first image, in which step 805 a first image is generated using an image generating device, in order to enable a virtual representation of the first image in a first representation area.

According to an embodiment, in the step 805 of generating, a first image is generated by: the image generating means is directed at the coupling-in structure of the display means in order to enable a virtual representation of the first image in the first representation area. In this case, according to an embodiment, in the step 805 of generating, the first image is generated by: the image generating device is arranged in such a way that it is aligned with the coupling-in structure of the display device, wherein, when the image generating device is used, a second image is also generated in order to simultaneously bring about a realistic representation of the second image in the second representation area in or at the waveguide.

According to an alternative exemplary embodiment, method 800 has a step 810 of moving, in which step 810 the image generating device is moved, wherein the second image is directed onto the projection area of the display device using the image generating device, in order to generate a real representation of the second image in the second representation area in or at the waveguide.

According to an alternative embodiment, the method 800 has a further generation step 815, in which step 815 a second image is generated using a display for generating second light, which display comprises a display surface, in order to bring about a real illustration of the second image in the second illustration region in or at the waveguide.

Steps

805 and 815 may be performed simultaneously.

If an embodiment comprises an "and/or" join between a first feature and a second feature, this is to be understood such that: this exemplary embodiment has both the first and the second feature according to one embodiment, and according to another embodiment either only the first or only the second feature.

Claims

1. A display device (100) for a field of view display apparatus of a vehicle (200), wherein the display device (100) has the following features:

a waveguide (205), the waveguide (205) having: -an in-coupling structure (215) for in-coupling a first light (220), the first light (220) representing a first image generated by an image generating device (225); a guiding structure (230) for guiding at least one light component of the first light (220) through the waveguide (205); and an output coupling structure (235) for coupling out the light component from the waveguide (205) so as to enable a virtual representation (110) of the first image in a first representation region (105) arranged remote from the waveguide (205), and

a display surface (210) arranged in or at the waveguide (205), the display surface (210) being configured to radiate second light (240) representing a second image so as to cause a realistic representation (115) of the second image on the display surface (210).

2. The display device (100) of claim 1, wherein the out-coupling structure (235) and the display surface (210) at least partially overlap.

3. The display device (100) of any one of the preceding claims, wherein the out-coupling structure (235) is at least partially arranged between the display surface (210) and the in-coupling structure (215).

4. The display device (100) according to any one of the preceding claims, wherein the display surface (210) is transparent for the light component coupled out by the out-coupling structures (235) and/or the out-coupling structures (235) are transparent for the second light (240) radiated by the display surface (210).

5. The display device (100) according to any one of the preceding claims, wherein the display surface (210) is shaped by a holographic plate and/or a scattering surface in the out-coupling structure (235).

6. The display device (100) of any one of the preceding claims, the display device (100) having the image generating device (225), the image generating device (225) being movably shaped and configured to emit the first light (220) and the second light (240), wherein the display surface (210) is shaped as a projection surface for the second light (240).

7. Display device (100) according to one of claims 1 to 5, the display device (100) having the image generation device (225), the image generation device (225) being configured so as to emit the first light (220) and the second light (240), wherein the incoupling structure (215) is configured in a switchable manner so as to guide the first light (220) to the guiding structure (230) in a first switching state and to guide the second light (240) to a deflection element (300) in a second switching state for deflecting the second light (240) to the display surface (210) shaped as a projection surface.

8. Display device (100) according to any of claims 1 to 5, the display device (100) having the image generation device (225), the image generation device (225) being configured so as to emit the first light (220) and the second light (240) simultaneously, wherein the display surface (210) is shaped as a projection surface for the second light (240).

9. The display device (100) according to any of claims 1 to 5, the display device (100) having the image generation device (225), the image generation device (225) being configured to emit the first light (220), and the display device (100) having a display (500) comprising the display surface (210) for generating the second light (240).

10. The display device (100) according to any one of the preceding claims, having the following means: the device is designed to recognize and/or track the gaze direction and/or the head position of the user.

11. A field of view display device, information display device or vehicle (200) having a display apparatus (100) according to any one of the preceding claims.

12. A method (800) for operating a display device (100) according to any one of claims 1 to 10, wherein the method (800) has the following steps:

in the case of the use of an image generation device (225), a first image is generated (805) in order to enable a virtual representation (110) of the first image in a first representation area (105).