Head-up display, in particular for a vehicle, having a conveyor-type display surface contactless

Abstract

The invention relates to a projection unit (7) for a field-of-view display device (2), comprising: a display surface (8) which is to be arranged in or below an upper face of an instrument panel (5) of a vehicle (1) and which is formed by a mechanically movable belt (10) with at least one light source strip (9) fastened thereto, a light source strip extending transversely to the belt movement direction (R) of the belt and carrying light sources arranged adjacent to each other in the direction of extension of the light source strip, which light sources can be controlled in a contactless manner in synchronization with the belt movement and independently of each other in order to produce desired display content in the display surface (8); and a receiver circuit board (16) and an associated transmitter circuit board (15), which is arranged in the projection unit (7) in a stationary manner and mechanically decoupled from the belt (10) and is designed to transmit energy and video signals to the light source in a contactless manner via the at least one receiver circuit board (16).

Description

Technical Field

[0001] The invention relates to a projection unit for a visual field display device, which is also known as a head-up display (HUD) and can be used in particular in motor vehicles or other land vehicles, air vehicles or water vehicles. Visual field display devices of this type are designed to generate a virtual image that appears in the user's visual field by reflection on the vehicle glass, in particular the windshield, or on a specially provided combined glass arranged in the user's visual field. The invention also relates to such a visual field display device and a vehicle equipped with the visual field display device. Background Art

[0002] In particular, it is known for motor vehicles to superimpose display contents (such as instructions about speed limits or other useful navigation and vehicle operation instructions) in the form of a virtual image on the real surroundings in front of the motor vehicle observed by the driver by means of a head-up display, so that the driver does not have to take his eyes off the road in order to read the display. In order to generate the display contents, a conventionally designed HUD includes a projection unit placed inside the dashboard below the windshield. Such a projection unit typically includes a display for generating a light beam with the desired display contents and an imaging and projection optical device, which usually has a concave mirror in order to shape the light beam and deflect it onto the windshield, so that the light beam is reflected from the windshield toward the driver's eyes, and the driver can therefore see the virtual image at an appropriate size and distance on the other side of the reflective glass. However, the size of the concave mirror scales linearly with the size of the virtual display area, which severely limits the virtual display area.

[0003] Therefore, as an alternative, for applications that require a significantly larger virtual display area, a HUD structure is known, which has a large-area display extending in the upper side of the instrument panel directly opposite the windshield. This is particularly conceivable for future fully automatic or autonomous vehicles, which should be able to cope without user input to guide the vehicle, so that the entertainment system in the passenger space is becoming more and more important. For example, it is desirable to use this type of HUD to present additional information to the driver and / or co-driver of the vehicle on the windshield in a situational manner and depending on the external environment over its entire width and also to display a continuous panoramic virtual image if necessary. For this purpose, the display that generates the image must extend over the entire width of the windshield.

[0004] In order to meet the high intensity requirements for display light when reflected in the transparent area of ​​the windshield during bright daytime, LED displays would be more suitable than LCD screens, since high intensity losses in the liquid crystal layer are unavoidable. However, for such a large display area, an excessive number of LEDs (several million) would be required, which in turn would significantly affect the energy balance and the greenhouse gas emissions of the vehicle associated therewith. The possible display size for a panoramic display is therefore 1200 mm (length) by 300 mm (width) for a ratio of 4:1. In the case of conventional display screens, it would be necessary to install about 2,000,000 LEDs for this purpose. These LEDs are arranged next to each other in about 1920 columns across the width of the HUD display. Such a large number of LEDs would generate greenhouse gas emissions of more than 1.2 CO2 equivalents.

[0005] In the prior art, a rotating display device, for example for design and toy merchandise or greeting cards, is known, which has a circular display surface that can be generated by rotation, as described, for example, in US9,190,028B2 or EP4030412A1. This rotating display device includes a fixed motor, at the motor shaft of which a rotating unit is fixed, so that the rotating unit is rotated by the motor. The rotating unit is constructed as at least one stick-shaped arm arranged in a radial direction, wherein the LED strip is fixed to the arm in the longitudinal direction. In order to synchronize the LED control with the rotation of the arm, a suitable rotation or position sensor is provided. According to an embodiment, the display device may include, for example, a single radial arm, two separate radial arms spaced 180° apart, or four separate radial arms spaced 90° apart. Similarly, WO2019 / 023489A1 discloses a device and method for displaying an image, which is generated by emitting or reflecting light from a rotating element (such as a blade of a fan).

[0006] In addition, WO99 / 35634 discloses a rotating display device having a circular, longitudinally elliptical or polygonal cross section and a plurality of display elements, which are evenly distributed on a moving belt, which forms the outer circumference of the device. In order to achieve a plurality of different radiation directions, partition walls with different inclinations can be provided between the individual display elements. US2004 / 0212572A1 discloses a similar display device, in which a belt is wound around one or more parallel rotation axes, which are arranged in the corners of the corresponding polygonal cross section. The energy and signal transmission to one or more LED strips required for generating a display is carried out by means of a communication unit, which is fixed on the belt and thus moves in a conveyor-like manner during operation, and the communication unit has a protruding metal or other type of solid contact, which is embedded in the corresponding contact ring on the surface of one of the rotating shafts and thus establishes electrical contact with the rotating shaft. At the corresponding position, metal strips are provided in the moving belt, which are used to make electrical contact with the contact ring of the rotating shaft. However, due to the fast and frequent rotation of the belt, wear of such sliding contacts may occur quickly. Thus, for example, the sliding contacts will need to be replaced regularly, which means ongoing costs for corresponding service. Summary of the invention

[0007] The object of the present invention is to provide an alternative and / or improved design for a field of view display device in terms of energy balance, robustness and / or economy, with which the generation of large-area virtual images (e.g. for panoramic displays) is also possible. The field of view display device should be suitable in particular for integration in a vehicle and for virtual display by reflection on its windshield.

[0008] This object is achieved by a projection unit according to claim 1 and a field of view display device comprising the projection unit and a vehicle equipped with the field of view display device according to the parallel claim. Further embodiments are given in the dependent claims. All further features and functions described in the claims and in the following description for the projection unit also apply to the field of view display device and the vehicle, and vice versa.

[0009] According to a first aspect, a projection unit for a visual field display device is provided, which can be designed in particular for use in a vehicle. The visual field display device is designed to display a virtual image in the user's visual field by reflection on a reflective glass arranged in the user's visual field, in particular a vehicle glass. The visual field display device can be designed, for example, as a head-up display (HUD).

[0010] The projection unit is designed to generate a projection light beam with desired display content when the visual field display device is in operation, and project it onto the reflective glass, so that the desired virtual image makes the user feel that it is floating on the other side of the reflective glass. The user can be the driver and / or the co-driver, but can also be other passengers of the vehicle.

[0011] For this purpose, the projection unit comprises at least one rectangular display surface for imaging, which display surface can be designed in particular for arrangement in or below the upper side of the rear shelf or dashboard of the vehicle. The display surface is constructed to save material and energy resources according to the conveyor belt design. For this purpose, the display surface comprises a belt that can be moved mechanically (also referred to as a "conveyor belt" here) together with at least one light source strip fixed to the belt, which extends transversely to the direction of movement of the belt and carries light sources, such as LEDs, arranged adjacent to each other along its extension direction. The corresponding light source strip can, for example, have the height (or width) of the desired display area and can be quickly moved back and forth over the entire width (or height) of the desired display area by means of the belt movement, or can be "rotated" along a constant direction of movement.

[0012] In order to generate the desired display content on the display surface, the light sources can be controlled in a contactless manner synchronously with the belt movement and independently of each other. For this purpose, at least one receiver circuit board fixed to the belt and electrically connected to the light source and at least one associated transmitter circuit board are provided. The transmitter circuit board is arranged in a fixed position and mechanically decoupled from the belt in the projection unit and is designed to transmit energy and video signals to the light source in a contactless manner via the at least one receiver circuit board.

[0013] The concept of the projection unit is, on the one hand, in a visual field display device, such as a HUD, which can be designed for use in a vehicle, by replacing a large-area display surface with high luminous intensity for generating images with a known conveyor-type display surface from other applications, such as it is required for panoramic virtual display or for AR applications (Augmented Reality) in the front windshield of a vehicle. Therefore, the number of LEDs required in the HUD display surface can be significantly reduced, so that although the rotation drive consumption for the conveyor belt is increased, a significant improvement in energy balance can be achieved, and thus the greenhouse gas emissions of the vehicle can also be reduced, and when the vehicle includes a battery-electric drive, a correspondingly longer cruising range can be achieved. In addition, the display surface can be simply scaled by adding other rectangular display surfaces of this type and can thus be flexibly adapted to the geometric requirements of different applications. Here, another concept is the completely contactless energy and signal supply of the light source arranged on the conveyor belt. As a result, the use of sliding contact can be abandoned, so that the conveyor belt has a lower rolling resistance overall and can thus achieve a longer operating time compared to the display device described at the beginning. This also makes it possible to achieve a greater robustness and reliability of the device, which is important in particular for use in vehicles.

[0014] According to one embodiment, for each rectangular display surface, the projection unit comprises two parallel belt rotation axes and a rotation drive, wherein the belt rotation axes extend at two mutually opposite edge sides of the rectangular display surface, and the rotation drive is configured to rotate at least one of the two belt rotation axes. Here, the belt forms a loop, which is stretched between the two belt rotation axes and is wound around the two belt rotation axes, wherein the at least one belt rotation axis that can be rotated by the rotation drive is configured to drive the belt to generate the belt movement. This may be, for example, a belt conveyor belt. The light source strip may, for example, extend parallel to the rotation axis.

[0015] In particular, in this embodiment, the at least one receiver circuit board can be fixed on the outside of the belt. Alternatively, the at least one receiver circuit board can also be integrated in the belt and in many other places. Here, the at least one transmitter circuit board is arranged in an empty intermediate space defined by the ring, so that the transmitter circuit board has no mechanical contact with the belt and the belt rotation axis. As a result, on the one hand, a transmitter device that saves as much space as possible can be achieved. In addition, the distance to the light source strip or to the receiver circuit board can be minimized and in particular data and energy can also be supplied to both sides of the ring, so as to increase the frame rate or data rate, for example. However, alternatively or additionally, one or more transmitter circuit boards can also be arranged elsewhere in the projection unit, for example outside the belt ring on its side facing away from the user and in many other places.

[0016] The contactless transmission of the electric current is carried out, for example, inductively and the transmission of the video signal is carried out contactlessly via NFC ("Near-Field-Communication", near field communication), wherein in principle other data transmission standards can also be used. Accordingly, at least a part of the transmitter circuit board and the receiver circuit board can be designed for inductively powering the light source (in other words, for contactless transmission of energy via electromagnetic induction), and at least a part of the transmitter circuit board and the receiver circuit board can be designed for contactless transmission of the video signal via NFC. For this purpose, the required electrical and electronic components, such as capacitors, receiving coils, antennas, etc., are arranged on the circuit boards.

[0017] The transmitter circuit boards and / or receiver circuit boards can be distributed in particular evenly along the strip and / or connected to one another. In this case, the receiver circuit boards can be integrated, for example, in the strip itself. However, as an alternative or in addition thereto, the receiver circuit boards can also be arranged on the strip next to the at least one light source strip or between the light source strips. With a greater number of transmitter and / or receiver circuit boards, for example, a correspondingly higher data rate for the transmission of video signals can be achieved.

[0018] According to one embodiment, the belt has a plurality of lamellae arranged on the outside and distributed, for example, uniformly along the belt movement direction. The lamellae extend parallel to one another and toward the light source strip and are designed to impose a predetermined radiation direction on the projection light generated by the light source strip and / or to shield the display surface in other directions. For this purpose, the lamellae can be spatially positioned, i.e. oriented, substantially parallel to one another in the entire display surface. They can be designed or coated, for example, to absorb light in order to block light in non-radiating directions.

[0019] Furthermore, the projection unit can include a cover plate, which extends along the display surface where the image is to be taken in the light path of the projection light emitted therefrom and is designed to transmit the projection light substantially without loss and at least partially close and protect the projection unit outwardly. In addition, the cover plate can be used to prevent the vehicle occupants from interfering with the conveyor-like moving elements of the display surface and can optionally be equipped with other mechanical and / or optical functions. The cover plate can be made of any material suitable for this purpose, for example, made of glass or transparent plastic (such as plexiglass, etc.).

[0020] According to another aspect, there is provided a visual field display device as described above, which, in addition to the projection unit introduced here, also includes the reflective glass as described above, which can be formed by a vehicle glass or can be constructed as an additionally provided combined glass. The reflective glass is arranged in the optical path of the projection light emitted from the projection unit. The reflective glass is reflective on the user side and can be at least partially transparent to the ambient light incident on the rear side, thereby superimposing a virtual image of the real environment observed by the user through the reflective glass. Here, the reflective glass is arranged and constructed in the user's visual field so that the reflective glass reflects the projection light to the eye box predetermined for the user's eyes, so that the display content can be shown to the user in the form of a virtual image on the other side of the reflective glass.

[0021] In the above-described embodiment, the sheet body can ideally extend approximately parallel to the reflective glass and when installed in a vehicle, for example, extend to the front windshield of the vehicle, so as to shield the user or passenger from the light source strip and only project light toward the reflective glass in the required direction.

[0022] According to another aspect, the above-mentioned transport vehicle is provided, which can be, for example, a motor vehicle or any other land transport vehicle, an air transport vehicle or a water transport vehicle. It has a passenger space and a transport vehicle glass, which at least partially defines the passenger space outwardly. The transport vehicle glass can be, for example, a front window glass with an instrument panel arranged below it or a rear front window glass with a rear window sill arranged below it, which define the passenger space forward or backward along the longitudinal direction of the transport vehicle. Unless otherwise specified, all spatial orientation terms used here, such as "horizontal", "vertical", "above", "below", "below", "front", "back", "left", "right", etc., refer to a Cartesian coordinate system with a longitudinal direction, a transverse direction and a height direction of a transport vehicle perpendicular to each other, and a generally fixed transport vehicle. In addition, the transport vehicle includes the above-mentioned visual field display device, the projection unit of which is arranged in the passenger space, in particular, arranged in or below the upper side of the window sill or the instrument panel, and the reflective glass of the visual field display device is constructed as a part of the transport vehicle glass or as a combined glass additionally arranged in the passenger space.

[0023] The windshield can be bounded in particular by the A-pillars of the vehicle to the left and to the right in the transverse direction of the vehicle, and the projection unit and its display surface for imaging are arranged in the upper side or below the instrument panel so that the windshield at least with its major part extending in the transverse direction of the vehicle serves as a reflective glass for the field of view display device. In this way, in particular a panoramic virtual display for the driver and / or the co-driver can be realized. For this purpose, in particular a plurality of rectangular display surfaces of the type presented here can be arranged side by side to obtain a larger total area. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above aspects of the present invention and its implementation and specific design solutions will be described in more detail below based on the examples shown in the accompanying drawings. The accompanying drawings are purely schematic and should not be understood as being in correct proportion. The drawings show:

[0025] Figure 1 A part of a vehicle having a visual field display device according to an exemplary embodiment of the present invention is shown in a vertical longitudinal section;

[0026] Figure 2a Show Figure 1 A cross-sectional view of a display surface of a visual field display device for imaging;

[0027] Figure 2b Show Figure 2a A top view of the display surface where imaging is performed; and

[0028] Figure 3 Show Figure 11 is a cross-sectional view of another example of an imaging display surface of a field of view display device, which additionally shows at least a part of a transmitter circuit board and a receiver circuit board which are provided for contactless transmission of energy and video signals.

[0029] All the various embodiments, modifications and special design features of the projection unit, the visual field display device and the means of transport according to the above aspects of the invention mentioned above in the description and in the claims below can be Figures 1 to 3 In the example shown in , in particular also instead of or in addition to the features shown therein are implemented. Therefore, they will not be repeated again in full below. The same applies to the above-mentioned Figure 1-3 The terminology and functions of the various features shown in . DETAILED DESCRIPTION

[0030] Figure 1 A part of a vehicle 1 having a visual display device 2 according to an exemplary embodiment of the present invention is shown in a greatly simplified schematic diagram in a vertical longitudinal section. The visual display device 2 is designed here purely by way of example as a head-up display (HUD).

[0031] The visual field display device 2 is designed to generate a virtual image V in the visual field of a user, such as a driver of the vehicle 1, who Figure 1 The vertical longitudinal section of the vehicle 1 is represented only by its eye 3 and the eye box E determined therefor in the passenger space of the vehicle 1. (Here, the eye box is generally understood to be a spatial area determined for the eyes of the user of the visual field display device 2, from which the user can see the virtual image V with the set display quality). The vehicle 1 is purely exemplarily a motor vehicle. The vehicle is in Figure 1 The vehicle is indicated only by its windshield 4 , an instrument panel 5 extending below the windshield and not shown in greater detail, and a roof 6 extending upward.

[0032] The visual field display device 2 includes a projection unit 7, which is arranged in the dashboard 5 below the windshield 4 in this example. The projection unit 7 is constructed and arranged to generate and emit a projection light beam L (also referred to as "projection light" for short) with corresponding desired display content in the direction of the windshield 4, so that the projection light L is reflected from the windshield 4 to the user's eye box E and the user thus sees a virtual image V when looking at the windshield 4.

[0033] For this purpose, the projection unit 7 has a rectangular imaging display surface 8, which is arranged with its surface in the upper side of the instrument panel 5 or almost directly below the upper side of the instrument panel and Figure 2a-2b and Figure 3 The projected light L is shown in more detail in Figure 1, which is represented only by its central ray, which is guided from the center of the display surface 8 where imaging is performed to the center of the eye box E. The projection unit 7 can optionally include a cover plate 11, which at least partially covers and protects the display surface 8 toward the front window 4 and transmits the projection light L emitted from the display surface as loss-free as possible.

[0034] Figure 2a-2b In cross-sectional view ( Figure 2a ) and top view ( Figure 2b ) shows Figure 1 The basic structure of an imaging display surface 8 of a projection unit 7 of FIG. In this example, a rectangular imaging display surface 8 is generated by a total of two light source strips 9, which are arranged equidistantly on a moving belt 10 (conveyor belt). By means of the conveyor belt 10, for example a belt conveyor belt, the light source strips 9, which in this example have a height of the desired display area measured in the longitudinal direction of the vehicle, are quickly moved back and forth over the entire width of the desired display area measured in the transverse direction of the vehicle and / or are always rotated in the same belt movement direction R. Each light source strip 9 carries light sources (not shown separately) arranged adjacent to each other in its longitudinal direction, in this example LEDs, which can be controlled independently of each other and synchronously with the belt movement in order to generate an image in the imaging display surface 8.

[0035] In order to generate such a conveyor belt movement, the projection unit 7 comprises two parallel belt rotation axes 12, which extend at two mutually opposite edge sides of the rectangular display surface 8, and a rotation drive device (not shown), which is designed to rotate at least one of the two belt rotation axes 12. Figure 2a As can be best seen in the cross-sectional view of , the belt 10 forms a loop here, which is stretched between and wound around the two belt rotation axes 12. In this example, the two belt rotation axes 12 have gear-like projections for driving the belt 10 when they rotate, wherein the belt 10 has complementary projections on its inner surface facing the rotation axes 12, which engage in a positive locking manner between the gear-like projections of the rotation axes.

[0036] Only one powerful electric rotary drive is required for the conveyor belt 10. In addition, the number of LED strips 9 used can be reduced to a minimum. Overall, the energy balance of the device can thus be optimized and the range of the vehicle can be increased in the case of battery-electric vehicles. In order to increase the operating time and robustness of the device, the energy and video signal transmission to the LED strips 9 is carried out contactlessly, as described below with the aid of Figure 3 As described.

[0037] Figure 3 Show Figure 1A cross-sectional view of another example of a rectangular imaging display surface 8 of a field display device 2. To avoid repetition, only the portions not referred to above are described below. Figure 2a-2b Thus, in Figure 3 In the embodiment, a total of four or more (not all shown) light source strips 9 are arranged on the conveyor belt 10, and these light source strips can be distributed particularly evenly along the belt 10. Figure 3 In the embodiment, a plurality of plates 14 are additionally arranged on the outside of the belt 10, which plates can also be distributed uniformly along the belt movement direction R, as shown. In this case, all plates 14 in the display surface 8 are spatially oriented identically to one another so that the projection light L (see Figure 1 ) is emitted toward the front window glass 4 along a predetermined radiation direction and effectively shields other viewing directions and radiation directions.

[0038] In this example, the transmission of the electric current takes place inductively and the transmission of the video signal takes place contactlessly via NFC (“Near Field Communication”). For this purpose, a correspondingly constructed transmitter circuit board 15 is arranged inside the conveyor belt 10, that is, in the empty intermediate space 17 formed thereby, and an associated receiver circuit board 16 is arranged on the outside of the conveyor belt 10. The receiver circuit board 16 is electrically connected to the light source strip 9 and is equipped with capacitors, receiving coils, antennas, etc. designed for the transmission. By providing a plurality of transmitter circuit boards 15 and receiving circuit boards 16, for example, the data rate of the signal transmission can be increased, wherein the plurality of transmitter circuit boards 15 can be arranged in the intermediate space 17 at a sufficient distance from one another for this purpose in order to avoid crosstalk. In Figure 3 In order to simplify the illustration, only the receiver circuit board 16 is shown on the side of the conveyor belt 10 facing the user and used as a display surface 8. The other conveyor belt side can be designed similarly, that is to say, with the same number of light source strips 9 and receiver circuit boards 16.

[0039] Reference numerals list

[0040] 1. Transportation

[0041] 2. Field of view display device

[0042] 3. User's Eyes

[0043] 4Front window glass

[0044] 5. Dashboard

[0045] 6 Canopy

[0046] 7 projection units

[0047] 8 Display surface for imaging

[0048] 9 light strips

[0049] 10 Moving belt, also known as conveyor belt

[0050] 11 Cover

[0051] 12 with rotating shaft

[0052] 14 pieces

[0053] 15 Transmitter circuit board

[0054] 16 Receiver Circuit Board

[0055] 17 The Space Between

[0056] E-User's Eye Box

[0057] L Projection light (light beam)

[0058] R with movement direction

[0059] V Virtual Image

Claims

1. A projection unit (7) for a field of view display device (2), the field of view display device being configured to display a virtual image (V) by reflection on a reflective glass, in particular a vehicle glass (4), arranged in the field of view of a user, the projection unit comprising: - at least one rectangular imaging display surface (8), which is to be arranged on the upper side or below the dashboard (5) of the vehicle (1) and is formed by a mechanically movable belt (10) together with at least one light source strip (9) fixed to the belt, which extends transversely to the belt movement direction (R) of the belt and carries light sources arranged adjacent to each other in the extension direction of the light source strip, which light sources can be controlled synchronously with the belt movement and independently of each other in a contactless manner to produce the desired display content in the display surface (8); and - at least one receiver circuit board (16) fixed to the strip (10) and electrically connected to the light source, and at least one associated transmitter circuit board (15), the transmitter circuit board being arranged in a fixed position and mechanically decoupled from the strip (10) in the projection unit (7) and being designed to transmit energy and video signals to the light source in a contactless manner via the at least one receiver circuit board (16).

2. The projection unit (7) according to claim 1, - for each rectangular display surface (8), it also includes two parallel belt rotation shafts (12) and a rotation drive device, the belt rotation shafts extending at two mutually opposite edge sides of the rectangular display surface, and the rotation drive device is configured to rotate at least one of the two belt rotation shafts (12); -in, The belt (10) forms a loop which is stretched between the two belt rotation axes (12) and is wound around the two belt rotation axes, wherein the at least one belt rotation axis (12) which can be rotated by a rotary drive device is configured to drive the belt (10) to generate the belt movement.

3. The projection unit (7) according to claim 2, wherein - the at least one receiver circuit board (16) is fixed on the outside to the belt (10); and / or The at least one transmitter circuit board (15) is arranged in the intermediate space (17) defined by the ring so that it has no mechanical contact with the belt (10) and with the belt rotation axis (12).

4. The projection unit (7) according to one of the preceding claims, wherein - At least a part of the transmitter circuit board and the receiver circuit board (15, 16) is designed for inductive powering of the light source.

5. The projection unit (7) according to one of the preceding claims, wherein - At least a portion of the transmitter circuit board and the receiver circuit board (15, 16) are configured for contactless transmission of video signals via near field communication.

6. The projection unit (7) according to one of the preceding claims, wherein - the transmitter circuit boards and / or receiver circuit boards (15, 16) are evenly distributed along the strip (10); and / or The receiver circuit board (16) is arranged on the strip (10) next to the at least one light source strip (9) or between the light source strips (9).

7. The projection unit (7) according to one of the preceding claims, wherein - The belt (10) has a plurality of plates (14) arranged on the outside and preferably evenly distributed along the belt movement direction (R), which plates extend parallel to each other and towards the light source strip (9) and are designed to give a predetermined radiation direction to the projection light (L) generated by the light source strip (9) and / or to shield the display surface (8).

8. The projection unit (7) according to claim 7, wherein The lamellae (14) are spatially oriented substantially parallel to one another across the entire display surface (8).

9. A visual field display device (2), in particular a visual field display device for use in a means of transport (1), the visual field display device comprising: - a projection unit (7) according to one of the preceding claims; as well as - a reflective glass arranged in the light path of the projection light (L) emitted from the projection unit (7), such as the vehicle glass (4) or an additionally provided composite glass; - wherein the reflective glass is arranged in the user's field of vision and is configured such that the reflective glass reflects the projection light (L) towards an eye box (E) predetermined for the user's eye (3), thereby being able to present the display content to the eye box in the form of a virtual image (V) on the other side of the reflective glass.

10. A vehicle (1), in particular a motor vehicle, having a longitudinal direction, a transverse direction and a height direction of a Cartesian coordinate system fixed to the vehicle, which are perpendicular to each other, and comprising: - a passenger compartment and a vehicle window, in particular a windshield (4) with a dashboard (5) arranged below the windshield, which at least partially delimits the passenger compartment to the outside; as well as - the visual field display device (2) according to claim 9, wherein the projection unit (7) of the visual field display device is arranged in the passenger space and the reflective glass of the visual field display device is configured as a part of the vehicle glass or as a combined glass additionally arranged in the passenger space; The projection unit (7) and its imaging display surface (8) are preferably arranged on the upper side or below the instrument panel (5), so that the windshield (4) at least with a large part of its horizontal extension serves as a reflective glass for the field of view display device (2).

Images